Fix IDE0090

.editorconfig

@@ -169,7 +169,7 @@ dotnet_diagnostic.IDE0082.severity = warning
 
 # IDE0090 Simplify 'new' expression
 #csharp_style_implicit_object_creation_when_type_is_apparent = true
-dotnet_diagnostic.IDE0090.severity = silent # Requires C# 9 - TODO Consider enabling
+dotnet_diagnostic.IDE0090.severity = warning
 
 # IDE0180 Use tuple to swap values
 #csharp_style_prefer_tuple_swap = true

OpenRA.Game/Actor.cs

@@ -84,21 +84,21 @@ namespace OpenRA
 		class ConditionState
 		{
 			/// <summary>Delegates that have registered to be notified when this condition changes.</summary>
-			public readonly List<VariableObserverNotifier> Notifiers = new List<VariableObserverNotifier>();
+			public readonly List<VariableObserverNotifier> Notifiers = new();
 
 			/// <summary>Unique integers identifying granted instances of the condition.</summary>
-			public readonly HashSet<int> Tokens = new HashSet<int>();
+			public readonly HashSet<int> Tokens = new();
 		}
 
-		readonly Dictionary<string, ConditionState> conditionStates = new Dictionary<string, ConditionState>();
+		readonly Dictionary<string, ConditionState> conditionStates = new();
 
 		/// <summary>Each granted condition receives a unique token that is used when revoking.</summary>
-		readonly Dictionary<int, string> conditionTokens = new Dictionary<int, string>();
+		readonly Dictionary<int, string> conditionTokens = new();
 
 		int nextConditionToken = 1;
 
 		/// <summary>Cache of condition -> enabled state for quick evaluation of token counter conditions.</summary>
-		readonly Dictionary<string, int> conditionCache = new Dictionary<string, int>();
+		readonly Dictionary<string, int> conditionCache = new();
 
 		/// <summary>Read-only version of conditionCache that is passed to IConditionConsumers.</summary>
 		readonly IReadOnlyDictionary<string, int> readOnlyConditionCache;

OpenRA.Game/CPos.cs

@@ -41,7 +41,7 @@ namespace OpenRA
 			Bits = (x & 0xFFF) << 20 | (y & 0xFFF) << 8 | layer;
 		}
 
-		public static readonly CPos Zero = new CPos(0, 0, 0);
+		public static readonly CPos Zero = new(0, 0, 0);
 
 		public static explicit operator CPos(int2 a) { return new CPos(a.X, a.Y); }
 

OpenRA.Game/CVec.cs

@@ -22,7 +22,7 @@ namespace OpenRA
 		public readonly int X, Y;
 
 		public CVec(int x, int y) { X = x; Y = y; }
-		public static readonly CVec Zero = new CVec(0, 0);
+		public static readonly CVec Zero = new(0, 0);
 
 		public static CVec operator +(CVec a, CVec b) { return new CVec(a.X + b.X, a.Y + b.Y); }
 		public static CVec operator -(CVec a, CVec b) { return new CVec(a.X - b.X, a.Y - b.Y); }

OpenRA.Game/ExternalMods.cs

@@ -41,7 +41,7 @@ namespace OpenRA
 
 	public class ExternalMods : IReadOnlyDictionary<string, ExternalMod>
 	{
-		readonly Dictionary<string, ExternalMod> mods = new Dictionary<string, ExternalMod>();
+		readonly Dictionary<string, ExternalMod> mods = new();
 		readonly SheetBuilder sheetBuilder;
 
 		Sheet CreateSheet()

OpenRA.Game/FieldLoader.cs

@@ -62,14 +62,14 @@ namespace OpenRA
 			throw new NotImplementedException($"FieldLoader: Missing field `{s}` on `{f.Name}`");
 
 		static readonly ConcurrentCache<Type, FieldLoadInfo[]> TypeLoadInfo =
-			new ConcurrentCache<Type, FieldLoadInfo[]>(BuildTypeLoadInfo);
+			new(BuildTypeLoadInfo);
 		static readonly ConcurrentCache<string, BooleanExpression> BooleanExpressionCache =
-			new ConcurrentCache<string, BooleanExpression>(expression => new BooleanExpression(expression));
+			new(expression => new BooleanExpression(expression));
 		static readonly ConcurrentCache<string, IntegerExpression> IntegerExpressionCache =
-			new ConcurrentCache<string, IntegerExpression>(expression => new IntegerExpression(expression));
+			new(expression => new IntegerExpression(expression));
 
 		static readonly Dictionary<Type, Func<string, Type, string, MemberInfo, object>> TypeParsers =
-			new Dictionary<Type, Func<string, Type, string, MemberInfo, object>>()
+			new()
 			{
 				{ typeof(int), ParseInt },
 				{ typeof(ushort), ParseUShort },
@@ -103,7 +103,7 @@ namespace OpenRA
 			};
 
 		static readonly Dictionary<Type, Func<string, Type, string, MiniYaml, MemberInfo, object>> GenericTypeParsers =
-			new Dictionary<Type, Func<string, Type, string, MiniYaml, MemberInfo, object>>()
+			new()
 			{
 				{ typeof(HashSet<>), ParseHashSetOrList },
 				{ typeof(List<>), ParseHashSetOrList },
@@ -749,7 +749,7 @@ namespace OpenRA
 		[AttributeUsage(AttributeTargets.Field)]
 		public class SerializeAttribute : Attribute
 		{
-			public static readonly SerializeAttribute Default = new SerializeAttribute(true);
+			public static readonly SerializeAttribute Default = new(true);
 
 			public bool IsDefault => this == Default;
 

OpenRA.Game/FileFormats/Png.cs

@@ -31,7 +31,7 @@ namespace OpenRA.FileFormats
 		public Color[] Palette { get; }
 		public byte[] Data { get; }
 		public SpriteFrameType Type { get; }
-		public Dictionary<string, string> EmbeddedData = new Dictionary<string, string>();
+		public Dictionary<string, string> EmbeddedData = new();
 
 		public int PixelStride => Type == SpriteFrameType.Indexed8 ? 1 : Type == SpriteFrameType.Rgb24 ? 3 : 4;
 

OpenRA.Game/FileSystem/FileSystem.cs

@@ -29,16 +29,16 @@ namespace OpenRA.FileSystem
 	public class FileSystem : IReadOnlyFileSystem
 	{
 		public IEnumerable<IReadOnlyPackage> MountedPackages => mountedPackages.Keys;
-		readonly Dictionary<IReadOnlyPackage, int> mountedPackages = new Dictionary<IReadOnlyPackage, int>();
-		readonly Dictionary<string, IReadOnlyPackage> explicitMounts = new Dictionary<string, IReadOnlyPackage>();
+		readonly Dictionary<IReadOnlyPackage, int> mountedPackages = new();
+		readonly Dictionary<string, IReadOnlyPackage> explicitMounts = new();
 		readonly string modID;
 
 		// Mod packages that should not be disposed
-		readonly List<IReadOnlyPackage> modPackages = new List<IReadOnlyPackage>();
+		readonly List<IReadOnlyPackage> modPackages = new();
 		readonly IReadOnlyDictionary<string, Manifest> installedMods;
 		readonly IPackageLoader[] packageLoaders;
 
-		Cache<string, List<IReadOnlyPackage>> fileIndex = new Cache<string, List<IReadOnlyPackage>>(_ => new List<IReadOnlyPackage>());
+		Cache<string, List<IReadOnlyPackage>> fileIndex = new(_ => new List<IReadOnlyPackage>());
 
 		public FileSystem(string modID, IReadOnlyDictionary<string, Manifest> installedMods, IPackageLoader[] packageLoaders)
 		{

OpenRA.Game/FileSystem/ZipFile.cs

@@ -95,7 +95,7 @@ namespace OpenRA.FileSystem
 
 		sealed class ReadWriteZipFile : ReadOnlyZipFile, IReadWritePackage
 		{
-			readonly MemoryStream pkgStream = new MemoryStream();
+			readonly MemoryStream pkgStream = new();
 
 			public ReadWriteZipFile(string filename, bool create = false)
 			{

OpenRA.Game/Game.cs

@@ -48,7 +48,7 @@ namespace OpenRA
 		internal static OrderManager OrderManager;
 		static Server.Server server;
 
-		public static MersenneTwister CosmeticRandom = new MersenneTwister(); // not synced
+		public static MersenneTwister CosmeticRandom = new(); // not synced
 
 		public static Renderer Renderer;
 		public static Sound Sound;
@@ -563,7 +563,7 @@ namespace OpenRA
 
 		// Note: These delayed actions should only be used by widgets or disposing objects
 		// - things that depend on a particular world should be queuing them on the world actor.
-		static volatile ActionQueue delayedActions = new ActionQueue();
+		static volatile ActionQueue delayedActions = new();
 
 		public static void RunAfterTick(Action a) { delayedActions.Add(a, RunTime); }
 		public static void RunAfterDelay(int delayMilliseconds, Action a) { delayedActions.Add(a, RunTime + delayMilliseconds); }

OpenRA.Game/GameInformation.cs

@@ -36,7 +36,7 @@ namespace OpenRA
 		public TimeSpan Duration => EndTimeUtc > StartTimeUtc ? EndTimeUtc - StartTimeUtc : TimeSpan.Zero;
 
 		public IList<Player> Players { get; }
-		public HashSet<int> DisabledSpawnPoints = new HashSet<int>();
+		public HashSet<int> DisabledSpawnPoints = new();
 		public MapPreview MapPreview => Game.ModData.MapCache[MapUid];
 		public IEnumerable<Player> HumanPlayers { get { return Players.Where(p => p.IsHuman); } }
 		public bool IsSinglePlayer => HumanPlayers.Count() == 1;

OpenRA.Game/GameRules/ActorInfo.cs

@@ -32,7 +32,7 @@ namespace OpenRA
 		/// You can remove inherited traits by adding a - in front of them as in -TraitName: to inherit everything, but this trait.
 		/// </summary>
 		public readonly string Name;
-		readonly TypeDictionary traits = new TypeDictionary();
+		readonly TypeDictionary traits = new();
 		List<TraitInfo> constructOrderCache = null;
 
 		public ActorInfo(ObjectCreator creator, string name, MiniYaml node)

OpenRA.Game/GameRules/SoundInfo.cs

@@ -17,14 +17,14 @@ namespace OpenRA.GameRules
 {
 	public class SoundInfo
 	{
-		public readonly Dictionary<string, string[]> Variants = new Dictionary<string, string[]>();
-		public readonly Dictionary<string, string[]> Prefixes = new Dictionary<string, string[]>();
-		public readonly Dictionary<string, string[]> Voices = new Dictionary<string, string[]>();
-		public readonly Dictionary<string, string[]> Notifications = new Dictionary<string, string[]>();
+		public readonly Dictionary<string, string[]> Variants = new();
+		public readonly Dictionary<string, string[]> Prefixes = new();
+		public readonly Dictionary<string, string[]> Voices = new();
+		public readonly Dictionary<string, string[]> Notifications = new();
 		public readonly string DefaultVariant = ".aud";
 		public readonly string DefaultPrefix = "";
-		public readonly HashSet<string> DisableVariants = new HashSet<string>();
-		public readonly HashSet<string> DisablePrefixes = new HashSet<string>();
+		public readonly HashSet<string> DisableVariants = new();
+		public readonly HashSet<string> DisablePrefixes = new();
 
 		public readonly Lazy<Dictionary<string, SoundPool>> VoicePools;
 		public readonly Lazy<Dictionary<string, SoundPool>> NotificationsPools;
@@ -69,7 +69,7 @@ namespace OpenRA.GameRules
 		public readonly float VolumeModifier;
 		public readonly InterruptType Type;
 		readonly string[] clips;
-		readonly List<string> liveclips = new List<string>();
+		readonly List<string> liveclips = new();
 
 		public SoundPool(float volumeModifier, InterruptType interruptType, params string[] clips)
 		{

OpenRA.Game/GameRules/WeaponInfo.cs

@@ -103,16 +103,16 @@ namespace OpenRA.GameRules
 		public readonly bool CanTargetSelf = false;
 
 		[Desc("What types of targets are affected.")]
-		public readonly BitSet<TargetableType> ValidTargets = new BitSet<TargetableType>("Ground", "Water");
+		public readonly BitSet<TargetableType> ValidTargets = new("Ground", "Water");
 
 		[Desc("What types of targets are unaffected.", "Overrules ValidTargets.")]
 		public readonly BitSet<TargetableType> InvalidTargets;
 
-		static readonly BitSet<TargetableType> TargetTypeAir = new BitSet<TargetableType>("Air");
+		static readonly BitSet<TargetableType> TargetTypeAir = new("Air");
 
 		[Desc("If weapon is not directly targeting an actor and targeted position is above this altitude,",
 			"the weapon will ignore terrain target types and only check TargetTypeAir for validity.")]
-		public readonly WDist AirThreshold = new WDist(128);
+		public readonly WDist AirThreshold = new(128);
 
 		[Desc("Delay in ticks between firing shots from the same ammo magazine. If one entry, it will be used for all bursts.",
 			"If multiple entries, their number needs to match Burst - 1.")]
@@ -128,7 +128,7 @@ namespace OpenRA.GameRules
 		public readonly IProjectileInfo Projectile;
 
 		[FieldLoader.LoadUsing(nameof(LoadWarheads))]
-		public readonly List<IWarhead> Warheads = new List<IWarhead>();
+		public readonly List<IWarhead> Warheads = new();
 
 		/// <summary>
 		/// This constructor is used solely for documentation generation.

OpenRA.Game/Graphics/ChromeProvider.cs

@@ -49,7 +49,7 @@ namespace OpenRA.Graphics
 
 			public readonly int[] PanelRegion = null;
 			public readonly PanelSides PanelSides = PanelSides.All;
-			public readonly Dictionary<string, Rectangle> Regions = new Dictionary<string, Rectangle>();
+			public readonly Dictionary<string, Rectangle> Regions = new();
 		}
 
 		public static IReadOnlyDictionary<string, Collection> Collections => collections;

OpenRA.Game/Graphics/CursorManager.cs

@@ -28,7 +28,7 @@ namespace OpenRA.Graphics
 			public IHardwareCursor[] Cursors;
 		}
 
-		readonly Dictionary<string, Cursor> cursors = new Dictionary<string, Cursor>();
+		readonly Dictionary<string, Cursor> cursors = new();
 		readonly SheetBuilder sheetBuilder;
 		readonly GraphicSettings graphicSettings;
 

OpenRA.Game/Graphics/HardwarePalette.cs

@@ -21,9 +21,9 @@ namespace OpenRA.Graphics
 		public ITexture ColorShifts { get; }
 
 		public int Height { get; private set; }
-		readonly Dictionary<string, ImmutablePalette> palettes = new Dictionary<string, ImmutablePalette>();
-		readonly Dictionary<string, MutablePalette> mutablePalettes = new Dictionary<string, MutablePalette>();
-		readonly Dictionary<string, int> indices = new Dictionary<string, int>();
+		readonly Dictionary<string, ImmutablePalette> palettes = new();
+		readonly Dictionary<string, MutablePalette> mutablePalettes = new();
+		readonly Dictionary<string, int> indices = new();
 		byte[] buffer = Array.Empty<byte>();
 		float[] colorShiftBuffer = Array.Empty<float>();
 

OpenRA.Game/Graphics/ModelRenderer.cs

@@ -37,7 +37,7 @@ namespace OpenRA.Graphics
 		// Static constants
 		static readonly float[] ShadowDiffuse = new float[] { 0, 0, 0 };
 		static readonly float[] ShadowAmbient = new float[] { 1, 1, 1 };
-		static readonly float2 SpritePadding = new float2(2, 2);
+		static readonly float2 SpritePadding = new(2, 2);
 		static readonly float[] ZeroVector = new float[] { 0, 0, 0, 1 };
 		static readonly float[] ZVector = new float[] { 0, 0, 1, 1 };
 		static readonly float[] FlipMtx = Util.ScaleMatrix(1, -1, 1);
@@ -47,9 +47,9 @@ namespace OpenRA.Graphics
 		readonly Renderer renderer;
 		readonly IShader shader;
 
-		readonly Dictionary<Sheet, IFrameBuffer> mappedBuffers = new Dictionary<Sheet, IFrameBuffer>();
-		readonly Stack<KeyValuePair<Sheet, IFrameBuffer>> unmappedBuffers = new Stack<KeyValuePair<Sheet, IFrameBuffer>>();
-		readonly List<(Sheet Sheet, Action Func)> doRender = new List<(Sheet, Action)>();
+		readonly Dictionary<Sheet, IFrameBuffer> mappedBuffers = new();
+		readonly Stack<KeyValuePair<Sheet, IFrameBuffer>> unmappedBuffers = new();
+		readonly List<(Sheet Sheet, Action Func)> doRender = new();
 
 		SheetBuilder sheetBuilderForFrame;
 		bool isInFrame;

OpenRA.Game/Graphics/RgbaColorRenderer.cs

@@ -18,7 +18,7 @@ namespace OpenRA.Graphics
 {
 	public class RgbaColorRenderer
 	{
-		static readonly float3 Offset = new float3(0.5f, 0.5f, 0f);
+		static readonly float3 Offset = new(0.5f, 0.5f, 0f);
 
 		readonly SpriteRenderer parent;
 		readonly Vertex[] vertices = new Vertex[6];

OpenRA.Game/Graphics/SheetBuilder.cs

@@ -34,7 +34,7 @@ namespace OpenRA.Graphics
 	public sealed class SheetBuilder : IDisposable
 	{
 		public readonly SheetType Type;
-		readonly List<Sheet> sheets = new List<Sheet>();
+		readonly List<Sheet> sheets = new();
 		readonly Func<Sheet> allocateSheet;
 		readonly int margin;
 		int rowHeight = 0;

OpenRA.Game/Graphics/SpriteCache.cs

@@ -24,14 +24,14 @@ namespace OpenRA.Graphics
 		readonly ISpriteLoader[] loaders;
 		readonly IReadOnlyFileSystem fileSystem;
 
-		readonly Dictionary<int, (int[] Frames, MiniYamlNode.SourceLocation Location)> spriteReservations = new Dictionary<int, (int[], MiniYamlNode.SourceLocation)>();
-		readonly Dictionary<int, (int[] Frames, MiniYamlNode.SourceLocation Location)> frameReservations = new Dictionary<int, (int[], MiniYamlNode.SourceLocation)>();
-		readonly Dictionary<string, List<int>> reservationsByFilename = new Dictionary<string, List<int>>();
+		readonly Dictionary<int, (int[] Frames, MiniYamlNode.SourceLocation Location)> spriteReservations = new();
+		readonly Dictionary<int, (int[] Frames, MiniYamlNode.SourceLocation Location)> frameReservations = new();
+		readonly Dictionary<string, List<int>> reservationsByFilename = new();
 
-		readonly Dictionary<int, ISpriteFrame[]> resolvedFrames = new Dictionary<int, ISpriteFrame[]>();
-		readonly Dictionary<int, Sprite[]> resolvedSprites = new Dictionary<int, Sprite[]>();
+		readonly Dictionary<int, ISpriteFrame[]> resolvedFrames = new();
+		readonly Dictionary<int, Sprite[]> resolvedSprites = new();
 
-		readonly Dictionary<int, (string Filename, MiniYamlNode.SourceLocation Location)> missingFiles = new Dictionary<int, (string, MiniYamlNode.SourceLocation)>();
+		readonly Dictionary<int, (string Filename, MiniYamlNode.SourceLocation Location)> missingFiles = new();
 
 		int nextReservationToken = 1;
 

OpenRA.Game/Graphics/TerrainSpriteLayer.cs

@@ -27,7 +27,7 @@ namespace OpenRA.Graphics
 		readonly IVertexBuffer<Vertex> vertexBuffer;
 		readonly Vertex[] vertices;
 		readonly bool[] ignoreTint;
-		readonly HashSet<int> dirtyRows = new HashSet<int>();
+		readonly HashSet<int> dirtyRows = new();
 		readonly int rowStride;
 		readonly bool restrictToBounds;
 

OpenRA.Game/Graphics/Viewport.cs

@@ -53,7 +53,7 @@ namespace OpenRA.Graphics
 
 		public WPos CenterPosition => worldRenderer.ProjectedPosition(CenterLocation);
 
-		public Rectangle Rectangle => new Rectangle(TopLeft, new Size(viewportSize.X, viewportSize.Y));
+		public Rectangle Rectangle => new(TopLeft, new Size(viewportSize.X, viewportSize.Y));
 		public int2 TopLeft => CenterLocation - viewportSize / 2;
 		public int2 BottomRight => CenterLocation + viewportSize / 2;
 		int2 viewportSize;

OpenRA.Game/Graphics/WorldRenderer.cs

@@ -31,19 +31,19 @@ namespace OpenRA.Graphics
 
 		public event Action PaletteInvalidated = null;
 
-		readonly HashSet<Actor> onScreenActors = new HashSet<Actor>();
-		readonly HardwarePalette palette = new HardwarePalette();
-		readonly Dictionary<string, PaletteReference> palettes = new Dictionary<string, PaletteReference>();
+		readonly HashSet<Actor> onScreenActors = new();
+		readonly HardwarePalette palette = new();
+		readonly Dictionary<string, PaletteReference> palettes = new();
 		readonly IRenderTerrain terrainRenderer;
 		readonly Lazy<DebugVisualizations> debugVis;
 		readonly Func<string, PaletteReference> createPaletteReference;
 		readonly bool enableDepthBuffer;
 
-		readonly List<IFinalizedRenderable> preparedRenderables = new List<IFinalizedRenderable>();
-		readonly List<IFinalizedRenderable> preparedOverlayRenderables = new List<IFinalizedRenderable>();
-		readonly List<IFinalizedRenderable> preparedAnnotationRenderables = new List<IFinalizedRenderable>();
+		readonly List<IFinalizedRenderable> preparedRenderables = new();
+		readonly List<IFinalizedRenderable> preparedOverlayRenderables = new();
+		readonly List<IFinalizedRenderable> preparedAnnotationRenderables = new();
 
-		readonly List<IRenderable> renderablesBuffer = new List<IRenderable>();
+		readonly List<IRenderable> renderablesBuffer = new();
 
 		internal WorldRenderer(ModData modData, World world)
 		{

OpenRA.Game/HotkeyDefinition.cs

@@ -19,8 +19,8 @@ namespace OpenRA
 		public readonly string Name;
 		public readonly Hotkey Default = Hotkey.Invalid;
 		public readonly string Description = "";
-		public readonly HashSet<string> Types = new HashSet<string>();
-		public readonly HashSet<string> Contexts = new HashSet<string>();
+		public readonly HashSet<string> Types = new();
+		public readonly HashSet<string> Contexts = new();
 		public readonly bool Readonly = false;
 		public bool HasDuplicates { get; internal set; }
 

OpenRA.Game/HotkeyManager.cs

@@ -18,8 +18,8 @@ namespace OpenRA
 	public sealed class HotkeyManager
 	{
 		readonly Dictionary<string, Hotkey> settings;
-		readonly Dictionary<string, HotkeyDefinition> definitions = new Dictionary<string, HotkeyDefinition>();
-		readonly Dictionary<string, Hotkey> keys = new Dictionary<string, Hotkey>();
+		readonly Dictionary<string, HotkeyDefinition> definitions = new();
+		readonly Dictionary<string, Hotkey> keys = new();
 
 		public HotkeyManager(IReadOnlyFileSystem fileSystem, Dictionary<string, Hotkey> settings, Manifest manifest)
 		{
@@ -102,7 +102,7 @@ namespace OpenRA
 			return null;
 		}
 
-		public HotkeyReference this[string name] => new HotkeyReference(GetHotkeyReference(name));
+		public HotkeyReference this[string name] => new(GetHotkeyReference(name));
 
 		public IEnumerable<HotkeyDefinition> Definitions => definitions.Values;
 	}

OpenRA.Game/IUtilityCommand.cs

@@ -19,15 +19,13 @@ namespace OpenRA
 	public class Utility
 	{
 		static readonly ConcurrentCache<Type, FieldInfo[]> TypeFields =
-			new ConcurrentCache<Type, FieldInfo[]>(type => type.GetFields());
+			new(type => type.GetFields());
 
 		static readonly ConcurrentCache<(MemberInfo Member, Type AttributeType), bool> MemberHasAttribute =
-			new ConcurrentCache<(MemberInfo Member, Type AttributeType), bool>(
-				x => Attribute.IsDefined(x.Member, x.AttributeType));
+			new(x => Attribute.IsDefined(x.Member, x.AttributeType));
 
 		static readonly ConcurrentCache<(MemberInfo Member, Type AttributeType, bool Inherit), object[]> MemberCustomAttributes =
-			new ConcurrentCache<(MemberInfo Member, Type AttributeType, bool Inherit), object[]>(
-				x => x.Member.GetCustomAttributes(x.AttributeType, x.Inherit));
+			new(x => x.Member.GetCustomAttributes(x.AttributeType, x.Inherit));
 
 		public static FieldInfo[] GetFields(Type type)
 		{

OpenRA.Game/Input/Hotkey.cs

@@ -15,7 +15,7 @@ namespace OpenRA
 {
 	public readonly struct Hotkey : IEquatable<Hotkey>
 	{
-		public static Hotkey Invalid = new Hotkey(Keycode.UNKNOWN, Modifiers.None);
+		public static Hotkey Invalid = new(Keycode.UNKNOWN, Modifiers.None);
 		public bool IsValid()
 		{
 			return Key != Keycode.UNKNOWN;

OpenRA.Game/Input/Keycode.cs

@@ -256,7 +256,7 @@ namespace OpenRA
 
 	public static class KeycodeExts
 	{
-		static readonly Dictionary<Keycode, string> KeyNames = new Dictionary<Keycode, string>
+		static readonly Dictionary<Keycode, string> KeyNames = new()
 		{
 			{ Keycode.UNKNOWN, "Undefined" },
 			{ Keycode.RETURN, "Return" },

OpenRA.Game/MPos.cs

@@ -19,7 +19,7 @@ namespace OpenRA
 		public readonly int U, V;
 
 		public MPos(int u, int v) { U = u; V = v; }
-		public static readonly MPos Zero = new MPos(0, 0);
+		public static readonly MPos Zero = new(0, 0);
 
 		public static bool operator ==(MPos me, MPos other) { return me.U == other.U && me.V == other.V; }
 		public static bool operator !=(MPos me, MPos other) { return !(me == other); }
@@ -71,7 +71,7 @@ namespace OpenRA
 		public readonly int U, V;
 
 		public PPos(int u, int v) { U = u; V = v; }
-		public static readonly PPos Zero = new PPos(0, 0);
+		public static readonly PPos Zero = new(0, 0);
 
 		public static bool operator ==(PPos me, PPos other) { return me.U == other.U && me.V == other.V; }
 		public static bool operator !=(PPos me, PPos other) { return !(me == other); }

OpenRA.Game/Manifest.cs

@@ -95,7 +95,7 @@ namespace OpenRA
 			"RequiresMods", "PackageFormats"
 		};
 
-		readonly TypeDictionary modules = new TypeDictionary();
+		readonly TypeDictionary modules = new();
 		readonly Dictionary<string, MiniYaml> yaml;
 
 		bool customDataLoaded;

OpenRA.Game/Map/CellRegion.cs

@@ -102,7 +102,7 @@ namespace OpenRA
 			return uv.U >= mapTopLeft.U && uv.U <= mapBottomRight.U && uv.V >= mapTopLeft.V && uv.V <= mapBottomRight.V;
 		}
 
-		public MapCoordsRegion MapCoords => new MapCoordsRegion(mapTopLeft, mapBottomRight);
+		public MapCoordsRegion MapCoords => new(mapTopLeft, mapBottomRight);
 
 		public CellRegionEnumerator GetEnumerator()
 		{

OpenRA.Game/Map/Map.cs

@@ -198,8 +198,8 @@ namespace OpenRA
 		public int2 MapSize { get; private set; }
 
 		// Player and actor yaml. Public for access by the map importers and lint checks.
-		public List<MiniYamlNode> PlayerDefinitions = new List<MiniYamlNode>();
-		public List<MiniYamlNode> ActorDefinitions = new List<MiniYamlNode>();
+		public List<MiniYamlNode> PlayerDefinitions = new();
+		public List<MiniYamlNode> ActorDefinitions = new();
 
 		// Custom map yaml. Public for access by the map importers and lint checks
 		public readonly MiniYaml RuleDefinitions;
@@ -210,7 +210,7 @@ namespace OpenRA
 		public readonly MiniYaml MusicDefinitions;
 		public readonly MiniYaml NotificationDefinitions;
 
-		public readonly Dictionary<CPos, TerrainTile> ReplacedInvalidTerrainTiles = new Dictionary<CPos, TerrainTile>();
+		public readonly Dictionary<CPos, TerrainTile> ReplacedInvalidTerrainTiles = new();
 
 		// Generated data
 		public readonly MapGrid Grid;
@@ -997,7 +997,7 @@ namespace OpenRA
 		/// </summary>
 		/// RectangularIsometric defines 1024 units along the diagonal axis,
 		/// giving a half-tile height step of sqrt(2) * 512
-		public WDist CellHeightStep => new WDist(Grid.Type == MapGridType.RectangularIsometric ? 724 : 512);
+		public WDist CellHeightStep => new(Grid.Type == MapGridType.RectangularIsometric ? 724 : 512);
 
 		public CPos CellContaining(WPos pos)
 		{

OpenRA.Game/Map/MapCache.cs

@@ -25,9 +25,9 @@ namespace OpenRA
 {
 	public sealed class MapCache : IEnumerable<MapPreview>, IDisposable
 	{
-		public static readonly MapPreview UnknownMap = new MapPreview(null, null, MapGridType.Rectangular, null);
+		public static readonly MapPreview UnknownMap = new(null, null, MapGridType.Rectangular, null);
 		public IReadOnlyDictionary<IReadOnlyPackage, MapClassification> MapLocations => mapLocations;
-		readonly Dictionary<IReadOnlyPackage, MapClassification> mapLocations = new Dictionary<IReadOnlyPackage, MapClassification>();
+		readonly Dictionary<IReadOnlyPackage, MapClassification> mapLocations = new();
 		public bool LoadPreviewImages = true;
 
 		readonly Cache<string, MapPreview> previews;
@@ -35,18 +35,18 @@ namespace OpenRA
 		readonly SheetBuilder sheetBuilder;
 		Thread previewLoaderThread;
 		bool previewLoaderThreadShutDown = true;
-		readonly object syncRoot = new object();
-		readonly Queue<MapPreview> generateMinimap = new Queue<MapPreview>();
+		readonly object syncRoot = new();
+		readonly Queue<MapPreview> generateMinimap = new();
 
 		public Dictionary<string, string> StringPool { get; } = new Dictionary<string, string>();
 
-		readonly List<MapDirectoryTracker> mapDirectoryTrackers = new List<MapDirectoryTracker>();
+		readonly List<MapDirectoryTracker> mapDirectoryTrackers = new();
 
 		/// <summary>
 		/// The most recently modified or loaded map at runtime.
 		/// </summary>
 		public string LastModifiedMap { get; private set; } = null;
-		readonly Dictionary<string, string> mapUpdates = new Dictionary<string, string>();
+		readonly Dictionary<string, string> mapUpdates = new();
 
 		string lastLoadedLastModifiedMap;
 

OpenRA.Game/Map/MapDirectoryTracker.cs

@@ -25,7 +25,7 @@ namespace OpenRA
 		readonly MapClassification classification;
 
 		enum MapAction { Add, Delete, Update }
-		readonly Dictionary<string, MapAction> mapActionQueue = new Dictionary<string, MapAction>();
+		readonly Dictionary<string, MapAction> mapActionQueue = new();
 
 		bool dirty = false;
 

OpenRA.Game/Map/MapGrid.cs

@@ -106,7 +106,7 @@ namespace OpenRA
 	public class MapGrid : IGlobalModData
 	{
 		public readonly MapGridType Type = MapGridType.Rectangular;
-		public readonly Size TileSize = new Size(24, 24);
+		public readonly Size TileSize = new(24, 24);
 		public readonly byte MaximumTerrainHeight = 0;
 		public readonly SubCell DefaultSubCell = (SubCell)byte.MaxValue;
 

OpenRA.Game/Map/ProjectedCellRegion.cs

@@ -59,7 +59,7 @@ namespace OpenRA
 		/// this does not validate whether individual map cells are actually
 		/// projected inside the region.
 		/// </summary>
-		public MapCoordsRegion CandidateMapCoords => new MapCoordsRegion(mapTopLeft, mapBottomRight);
+		public MapCoordsRegion CandidateMapCoords => new(mapTopLeft, mapBottomRight);
 
 		public ProjectedCellRegionEnumerator GetEnumerator()
 		{

OpenRA.Game/Map/TerrainInfo.cs

@@ -60,7 +60,7 @@ namespace OpenRA
 	{
 		public readonly string Type;
 		public readonly BitSet<TargetableType> TargetTypes;
-		public readonly HashSet<string> AcceptsSmudgeType = new HashSet<string>();
+		public readonly HashSet<string> AcceptsSmudgeType = new();
 		public readonly Color Color;
 		public readonly bool RestrictPlayerColor = false;
 

OpenRA.Game/Network/Connection.cs

@@ -42,9 +42,9 @@ namespace OpenRA.Network
 	public sealed class EchoConnection : IConnection
 	{
 		const int LocalClientId = 1;
-		readonly Queue<(int Frame, int SyncHash, ulong DefeatState)> sync = new Queue<(int, int, ulong)>();
-		readonly Queue<(int Frame, OrderPacket Orders)> orders = new Queue<(int, OrderPacket)>();
-		readonly Queue<OrderPacket> immediateOrders = new Queue<OrderPacket>();
+		readonly Queue<(int Frame, int SyncHash, ulong DefeatState)> sync = new();
+		readonly Queue<(int Frame, OrderPacket Orders)> orders = new();
+		readonly Queue<OrderPacket> immediateOrders = new();
 		bool disposed;
 
 		int IConnection.LocalClientId => LocalClientId;
@@ -100,12 +100,12 @@ namespace OpenRA.Network
 	{
 		public readonly ConnectionTarget Target;
 		internal ReplayRecorder Recorder { get; private set; }
-		readonly Queue<(int Frame, int SyncHash, ulong DefeatState)> sentSync = new Queue<(int, int, ulong)>();
-		readonly Queue<(int Frame, int SyncHash, ulong DefeatState)> queuedSyncPackets = new Queue<(int, int, ulong)>();
+		readonly Queue<(int Frame, int SyncHash, ulong DefeatState)> sentSync = new();
+		readonly Queue<(int Frame, int SyncHash, ulong DefeatState)> queuedSyncPackets = new();
 
-		readonly Queue<(int Frame, OrderPacket Orders)> sentOrders = new Queue<(int, OrderPacket)>();
-		readonly Queue<OrderPacket> sentImmediateOrders = new Queue<OrderPacket>();
-		readonly ConcurrentQueue<(int FromClient, byte[] Data)> receivedPackets = new ConcurrentQueue<(int, byte[])>();
+		readonly Queue<(int Frame, OrderPacket Orders)> sentOrders = new();
+		readonly Queue<OrderPacket> sentImmediateOrders = new();
+		readonly ConcurrentQueue<(int FromClient, byte[] Data)> receivedPackets = new();
 		TcpClient tcp;
 		volatile ConnectionState connectionState = ConnectionState.Connecting;
 		volatile int clientId;

OpenRA.Game/Network/GameSave.cs

@@ -81,7 +81,7 @@ namespace OpenRA.Network
 		public const int MetadataMarker = -1;
 		public const int TraitDataMarker = -3;
 
-		readonly MemoryStream ordersStream = new MemoryStream();
+		readonly MemoryStream ordersStream = new();
 
 		// Loaded from file and updated during gameplay
 		public int LastOrdersFrame { get; private set; }
@@ -92,7 +92,7 @@ namespace OpenRA.Network
 		public Session.Global GlobalSettings { get; private set; }
 		public Dictionary<string, Session.Slot> Slots { get; private set; }
 		public Dictionary<string, SlotClient> SlotClients { get; private set; }
-		public Dictionary<int, MiniYaml> TraitData = new Dictionary<int, MiniYaml>();
+		public Dictionary<int, MiniYaml> TraitData = new();
 
 		// Set on game start
 		int[] clientsBySlotIndex = Array.Empty<int>();

OpenRA.Game/Network/Nat.cs

@@ -39,7 +39,7 @@ namespace OpenRA.Network
 			initialized = true;
 		}
 
-		static readonly SemaphoreSlim Locker = new SemaphoreSlim(1, 1);
+		static readonly SemaphoreSlim Locker = new(1, 1);
 
 		static async void DeviceFound(object sender, DeviceEventArgs args)
 		{

OpenRA.Game/Network/OrderIO.cs

@@ -78,7 +78,7 @@ namespace OpenRA.Network
 
 	public static class OrderIO
 	{
-		static readonly OrderPacket NoOrders = new OrderPacket(Array.Empty<Order>());
+		static readonly OrderPacket NoOrders = new(Array.Empty<Order>());
 
 		public static byte[] SerializeSync((int Frame, int SyncHash, ulong DefeatState) data)
 		{

OpenRA.Game/Network/OrderManager.cs

@@ -23,10 +23,10 @@ namespace OpenRA.Network
 		const OrderPacket ClientDisconnected = null;
 
 		readonly SyncReport syncReport;
-		readonly Dictionary<int, Queue<(int Frame, OrderPacket Orders)>> pendingOrders = new Dictionary<int, Queue<(int, OrderPacket)>>();
-		readonly Dictionary<int, (int SyncHash, ulong DefeatState)> syncForFrame = new Dictionary<int, (int, ulong)>();
+		readonly Dictionary<int, Queue<(int Frame, OrderPacket Orders)>> pendingOrders = new();
+		readonly Dictionary<int, (int SyncHash, ulong DefeatState)> syncForFrame = new();
 
-		public Session LobbyInfo = new Session();
+		public Session LobbyInfo = new();
 
 		/// <summary>Null when watching a replay.</summary>
 		public Session.Client LocalClient => LobbyInfo.ClientWithIndex(Connection.LocalClientId);
@@ -47,11 +47,11 @@ namespace OpenRA.Network
 		internal int GameSaveLastFrame = -1;
 		internal int GameSaveLastSyncFrame = -1;
 
-		readonly List<Order> localOrders = new List<Order>();
-		readonly List<Order> localImmediateOrders = new List<Order>();
+		readonly List<Order> localOrders = new();
+		readonly List<Order> localImmediateOrders = new();
 
-		readonly List<ClientOrder> processClientOrders = new List<ClientOrder>();
-		readonly List<int> processClientsToRemove = new List<int>();
+		readonly List<ClientOrder> processClientOrders = new();
+		readonly List<int> processClientsToRemove = new();
 
 		bool disposed;
 		bool generateSyncReport = false;

OpenRA.Game/Network/ReplayConnection.cs

@@ -24,8 +24,8 @@ namespace OpenRA.Network
 			public (int ClientId, byte[] Packet)[] Packets;
 		}
 
-		readonly Queue<Chunk> chunks = new Queue<Chunk>();
-		readonly Queue<(int Frame, int SyncHash, ulong DefeatState)> sync = new Queue<(int, int, ulong)>();
+		readonly Queue<Chunk> chunks = new();
+		readonly Queue<(int Frame, int SyncHash, ulong DefeatState)> sync = new();
 		readonly int orderLatency;
 
 		public readonly int TickCount;

OpenRA.Game/Network/ReplayRecorder.cs

@@ -24,7 +24,7 @@ namespace OpenRA.Network
 		public ReplayMetadata Metadata;
 		BinaryWriter writer;
 		readonly Func<string> chooseFilename;
-		MemoryStream preStartBuffer = new MemoryStream();
+		MemoryStream preStartBuffer = new();
 
 		static bool IsGameStart(byte[] data)
 		{

OpenRA.Game/Network/Session.cs

@@ -20,14 +20,14 @@ namespace OpenRA.Network
 {
 	public class Session
 	{
-		public List<Client> Clients = new List<Client>();
+		public List<Client> Clients = new();
 
 		// Keyed by the PlayerReference id that the slot corresponds to
-		public Dictionary<string, Slot> Slots = new Dictionary<string, Slot>();
+		public Dictionary<string, Slot> Slots = new();
 
-		public HashSet<int> DisabledSpawnPoints = new HashSet<int>();
+		public HashSet<int> DisabledSpawnPoints = new();
 
-		public Global GlobalSettings = new Global();
+		public Global GlobalSettings = new();
 
 		public static string AnonymizeIP(IPAddress ip)
 		{
@@ -221,7 +221,7 @@ namespace OpenRA.Network
 			public int NetFrameInterval = 3;
 
 			[FieldLoader.Ignore]
-			public Dictionary<string, LobbyOptionState> LobbyOptions = new Dictionary<string, LobbyOptionState>();
+			public Dictionary<string, LobbyOptionState> LobbyOptions = new();
 
 			public static Global Deserialize(MiniYaml data)
 			{

OpenRA.Game/Network/SyncReport.cs

@@ -22,7 +22,7 @@ namespace OpenRA.Network
 	class SyncReport
 	{
 		const int NumSyncReports = 7;
-		static readonly Cache<Type, TypeInfo> TypeInfoCache = new Cache<Type, TypeInfo>(t => new TypeInfo(t));
+		static readonly Cache<Type, TypeInfo> TypeInfoCache = new(t => new TypeInfo(t));
 
 		readonly OrderManager orderManager;
 
@@ -166,9 +166,9 @@ namespace OpenRA.Network
 			public int Frame;
 			public int SyncedRandom;
 			public int TotalCount;
-			public readonly List<TraitReport> Traits = new List<TraitReport>();
-			public readonly List<EffectReport> Effects = new List<EffectReport>();
-			public readonly List<OrderManager.ClientOrder> Orders = new List<OrderManager.ClientOrder>();
+			public readonly List<TraitReport> Traits = new();
+			public readonly List<EffectReport> Effects = new();
+			public readonly List<OrderManager.ClientOrder> Orders = new();
 		}
 
 		struct TraitReport
@@ -278,7 +278,7 @@ namespace OpenRA.Network
 		/// </summary>
 		struct Values
 		{
-			static readonly object Sentinel = new object();
+			static readonly object Sentinel = new();
 
 			object item1OrArray;
 			object item2OrSentinel;

OpenRA.Game/ObjectCreator.cs

@@ -22,7 +22,7 @@ namespace OpenRA
 	{
 		// .NET does not support unloading assemblies, so mod libraries will leak across mod changes.
 		// This tracks the assemblies that have been loaded since game start so that we don't load multiple copies
-		static readonly Dictionary<string, Assembly> ResolvedAssemblies = new Dictionary<string, Assembly>();
+		static readonly Dictionary<string, Assembly> ResolvedAssemblies = new();
 
 		readonly Cache<string, Type> typeCache;
 		readonly Cache<Type, ConstructorInfo> ctorCache;

OpenRA.Game/Primitives/ActionQueue.cs

@@ -19,7 +19,7 @@ namespace OpenRA.Primitives
 	/// </summary>
 	public class ActionQueue
 	{
-		readonly List<DelayedAction> actions = new List<DelayedAction>();
+		readonly List<DelayedAction> actions = new();
 
 		public void Add(Action a, long desiredTime)
 		{

OpenRA.Game/Primitives/BitSet.cs

@@ -18,7 +18,7 @@ namespace OpenRA.Primitives
 {
 	static class BitSetAllocator<T> where T : class
 	{
-		static readonly Cache<string, BitSetIndex> Bits = new Cache<string, BitSetIndex>(Allocate);
+		static readonly Cache<string, BitSetIndex> Bits = new(Allocate);
 		static BitSetIndex nextBits = 1;
 
 		static BitSetIndex Allocate(string value)

OpenRA.Game/Primitives/LongBitSet.cs

@@ -17,7 +17,7 @@ namespace OpenRA.Primitives
 {
 	static class LongBitSetAllocator<T> where T : class
 	{
-		static readonly Cache<string, long> Bits = new Cache<string, long>(Allocate);
+		static readonly Cache<string, long> Bits = new(Allocate);
 		static long nextBits = 1;
 
 		static long Allocate(string value)

OpenRA.Game/Primitives/Polygon.cs

@@ -16,7 +16,7 @@ namespace OpenRA.Primitives
 {
 	public readonly struct Polygon
 	{
-		public static readonly Polygon Empty = new Polygon(Rectangle.Empty);
+		public static readonly Polygon Empty = new(Rectangle.Empty);
 
 		public readonly Rectangle BoundingRect;
 		public readonly int2[] Vertices;

OpenRA.Game/Primitives/ReadOnlyAdapterStream.cs

@@ -21,7 +21,7 @@ namespace OpenRA.Primitives
 	/// </summary>
 	public abstract class ReadOnlyAdapterStream : Stream
 	{
-		readonly Queue<byte> data = new Queue<byte>(1024);
+		readonly Queue<byte> data = new(1024);
 		readonly Stream baseStream;
 		bool baseStreamEmpty;
 

OpenRA.Game/Primitives/Rectangle.cs

@@ -63,13 +63,13 @@ namespace OpenRA.Primitives
 		public int Top => Y;
 		public int Bottom => Y + Height;
 		public bool IsEmpty => X == 0 && Y == 0 && Width == 0 && Height == 0;
-		public int2 Location => new int2(X, Y);
-		public Size Size => new Size(Width, Height);
+		public int2 Location => new(X, Y);
+		public Size Size => new(Width, Height);
 
 		public int2 TopLeft => Location;
-		public int2 TopRight => new int2(X + Width, Y);
-		public int2 BottomLeft => new int2(X, Y + Height);
-		public int2 BottomRight => new int2(X + Width, Y + Height);
+		public int2 TopRight => new(X + Width, Y);
+		public int2 BottomLeft => new(X, Y + Height);
+		public int2 BottomRight => new(X + Width, Y + Height);
 
 		public bool Contains(int x, int y)
 		{

OpenRA.Game/Primitives/SpatiallyPartitioned.cs

@@ -18,7 +18,7 @@ namespace OpenRA.Primitives
 	{
 		readonly int rows, cols, binSize;
 		readonly Dictionary<T, Rectangle>[] itemBoundsBins;
-		readonly Dictionary<T, Rectangle> itemBounds = new Dictionary<T, Rectangle>();
+		readonly Dictionary<T, Rectangle> itemBounds = new();
 		readonly Action<Dictionary<T, Rectangle>, T, Rectangle> addItem = (bin, actor, bounds) => bin.Add(actor, bounds);
 		readonly Action<Dictionary<T, Rectangle>, T, Rectangle> removeItem = (bin, actor, bounds) => bin.Remove(actor);
 

OpenRA.Game/Primitives/TypeDictionary.cs

@@ -19,7 +19,7 @@ namespace OpenRA.Primitives
 	public class TypeDictionary : IEnumerable
 	{
 		static readonly Func<Type, List<object>> CreateList = type => new List<object>();
-		readonly Dictionary<Type, List<object>> data = new Dictionary<Type, List<object>>();
+		readonly Dictionary<Type, List<object>> data = new();
 
 		public void Add(object val)
 		{

OpenRA.Game/Primitives/float2.cs

@@ -76,7 +76,7 @@ namespace OpenRA
 
 		public override string ToString() { return X + "," + Y; }
 
-		public static readonly float2 Zero = new float2(0, 0);
+		public static readonly float2 Zero = new(0, 0);
 
 		public static bool WithinEpsilon(float2 a, float2 b, float e)
 		{

OpenRA.Game/Primitives/float3.cs

@@ -20,7 +20,7 @@ namespace OpenRA
 	public readonly struct float3 : IEquatable<float3>
 	{
 		public readonly float X, Y, Z;
-		public float2 XY => new float2(X, Y);
+		public float2 XY => new(X, Y);
 
 		public float3(float x, float y, float z) { X = x; Y = y; Z = z; }
 		public float3(float2 xy, float z) { X = xy.X; Y = xy.Y; Z = z; }
@@ -60,7 +60,7 @@ namespace OpenRA
 
 		public override string ToString() { return $"{X},{Y},{Z}"; }
 
-		public static readonly float3 Zero = new float3(0, 0, 0);
-		public static readonly float3 Ones = new float3(1, 1, 1);
+		public static readonly float3 Zero = new(0, 0, 0);
+		public static readonly float3 Ones = new(1, 1, 1);
 	}
 }

OpenRA.Game/Primitives/int2.cs

@@ -59,7 +59,7 @@ namespace OpenRA
 		public static int2 Max(int2 a, int2 b) { return new int2(Math.Max(a.X, b.X), Math.Max(a.Y, b.Y)); }
 		public static int2 Min(int2 a, int2 b) { return new int2(Math.Min(a.X, b.X), Math.Min(a.Y, b.Y)); }
 
-		public static readonly int2 Zero = new int2(0, 0);
+		public static readonly int2 Zero = new(0, 0);
 		public float2 ToFloat2() { return new float2(X, Y); }
 
 		// Change endianness of a uint32

OpenRA.Game/Renderer.cs

@@ -44,7 +44,7 @@ namespace OpenRA
 		internal int TempBufferSize { get; }
 
 		readonly IVertexBuffer<Vertex> tempBuffer;
-		readonly Stack<Rectangle> scissorState = new Stack<Rectangle>();
+		readonly Stack<Rectangle> scissorState = new();
 
 		IFrameBuffer screenBuffer;
 		Sprite screenSprite;
@@ -63,7 +63,7 @@ namespace OpenRA
 
 		float depthMargin;
 
-		Size lastBufferSize = new Size(-1, -1);
+		Size lastBufferSize = new(-1, -1);
 
 		Rectangle lastWorldViewport = Rectangle.Empty;
 		ITexture currentPaletteTexture;

OpenRA.Game/Scripting/ScriptMemberExts.cs

@@ -18,7 +18,7 @@ namespace OpenRA.Scripting
 {
 	public static class ScriptMemberExts
 	{
-		static readonly Dictionary<string, string> LuaTypeNameReplacements = new Dictionary<string, string>()
+		static readonly Dictionary<string, string> LuaTypeNameReplacements = new()
 		{
 			{ "Void", "void" },
 			{ "Int32", "int" },

OpenRA.Game/Scripting/ScriptObjectWrapper.cs

@@ -22,7 +22,7 @@ namespace OpenRA.Scripting
 		protected abstract string MemberNotFoundError(string memberName);
 
 		protected readonly ScriptContext Context;
-		readonly Dictionary<string, ScriptMemberWrapper> members = new Dictionary<string, ScriptMemberWrapper>();
+		readonly Dictionary<string, ScriptMemberWrapper> members = new();
 
 #if !NET5_0_OR_GREATER
 		readonly List<string> membersToRemove = new List<string>();

OpenRA.Game/Server/Connection.cs

@@ -41,8 +41,8 @@ namespace OpenRA.Server
 
 		long lastReceivedTime = 0;
 
-		readonly BlockingCollection<byte[]> sendQueue = new BlockingCollection<byte[]>();
-		readonly Queue<int> pingHistory = new Queue<int>();
+		readonly BlockingCollection<byte[]> sendQueue = new();
+		readonly Queue<int> pingHistory = new();
 
 		public Connection(Server server, Socket socket, string authToken)
 		{

OpenRA.Game/Server/MapStatusCache.cs

@@ -20,7 +20,7 @@ namespace OpenRA.Server
 
 	public class MapStatusCache
 	{
-		readonly Dictionary<MapPreview, Session.MapStatus> cache = new Dictionary<MapPreview, Session.MapStatus>();
+		readonly Dictionary<MapPreview, Session.MapStatus> cache = new();
 		readonly Action<string, Session.MapStatus> onStatusChanged;
 		readonly bool enableRemoteLinting;
 		readonly ModData modData;

OpenRA.Game/Server/OrderBuffer.cs

@@ -31,8 +31,8 @@ namespace OpenRA.Server
 		Stopwatch gameTimer;
 		long nextUpdate = 0;
 
-		readonly ConcurrentDictionary<int, long> timestamps = new ConcurrentDictionary<int, long>();
-		readonly ConcurrentDictionary<int, Queue<long>> deltas = new ConcurrentDictionary<int, Queue<long>>();
+		readonly ConcurrentDictionary<int, long> timestamps = new();
+		readonly ConcurrentDictionary<int, Queue<long>> deltas = new();
 
 		int timestep;
 		int ticksPerInterval;

OpenRA.Game/Server/PlayerMessageTracker.cs

@@ -19,7 +19,7 @@ namespace OpenRA.Server
 		[TranslationReference("remaining")]
 		const string ChatTemporaryDisabled = "notification-chat-temp-disabled";
 
-		readonly Dictionary<int, List<long>> messageTracker = new Dictionary<int, List<long>>();
+		readonly Dictionary<int, List<long>> messageTracker = new();
 		readonly Server server;
 		readonly Action<Connection, int, int, byte[]> dispatchOrdersToClient;
 		readonly Action<Connection, string, Dictionary<string, object>> sendLocalizedMessageTo;

OpenRA.Game/Server/Server.cs

@@ -115,15 +115,15 @@ namespace OpenRA.Server
 		[TranslationReference]
 		const string GameStarted = "notification-game-started";
 
-		public readonly MersenneTwister Random = new MersenneTwister();
+		public readonly MersenneTwister Random = new();
 		public readonly ServerType Type;
 
-		public readonly List<Connection> Conns = new List<Connection>();
+		public readonly List<Connection> Conns = new();
 
 		public Session LobbyInfo;
 		public ServerSettings Settings;
 		public ModData ModData;
-		public List<string> TempBans = new List<string>();
+		public List<string> TempBans = new();
 
 		// Managed by LobbyCommands
 		public MapPreview Map;
@@ -134,19 +134,19 @@ namespace OpenRA.Server
 		public int OrderLatency = 1;
 
 		readonly int randomSeed;
-		readonly List<TcpListener> listeners = new List<TcpListener>();
-		readonly TypeDictionary serverTraits = new TypeDictionary();
+		readonly List<TcpListener> listeners = new();
+		readonly TypeDictionary serverTraits = new();
 		readonly PlayerDatabase playerDatabase;
 
 		OrderBuffer orderBuffer;
 
 		volatile ServerState internalState = ServerState.WaitingPlayers;
 
-		readonly BlockingCollection<IServerEvent> events = new BlockingCollection<IServerEvent>();
+		readonly BlockingCollection<IServerEvent> events = new();
 
 		ReplayRecorder recorder;
 		GameInformation gameInfo;
-		readonly List<GameInformation.Player> worldPlayers = new List<GameInformation.Player>();
+		readonly List<GameInformation.Player> worldPlayers = new();
 		readonly Stopwatch pingUpdated = Stopwatch.StartNew();
 		readonly PlayerMessageTracker playerMessageTracker;
 
@@ -802,7 +802,7 @@ namespace OpenRA.Server
 			recorder = null;
 		}
 
-		readonly Dictionary<int, byte[]> syncForFrame = new Dictionary<int, byte[]>();
+		readonly Dictionary<int, byte[]> syncForFrame = new();
 		int lastDefeatStateFrame;
 		ulong lastDefeatState;
 

OpenRA.Game/Settings.cs

@@ -177,10 +177,10 @@ namespace OpenRA
 		public bool VSync = true;
 
 		[Desc("Screen resolution in fullscreen mode.")]
-		public int2 FullscreenSize = new int2(0, 0);
+		public int2 FullscreenSize = new(0, 0);
 
 		[Desc("Screen resolution in windowed mode.")]
-		public int2 WindowedSize = new int2(1024, 768);
+		public int2 WindowedSize = new(1024, 768);
 
 		public bool CursorDouble = false;
 		public WorldViewport ViewportDistance = WorldViewport.Medium;
@@ -253,7 +253,7 @@ namespace OpenRA
 
 		public bool LockMouseWindow = false;
 		public MouseScrollType MouseScroll = MouseScrollType.Joystick;
-		public MouseButtonPreference MouseButtonPreference = new MouseButtonPreference();
+		public MouseButtonPreference MouseButtonPreference = new();
 		public float ViewportEdgeScrollStep = 30f;
 		public float UIScrollSpeed = 50f;
 		public float ZoomSpeed = 0.04f;
@@ -295,20 +295,20 @@ namespace OpenRA
 	{
 		readonly string settingsFile;
 
-		public readonly PlayerSettings Player = new PlayerSettings();
-		public readonly GameSettings Game = new GameSettings();
-		public readonly SoundSettings Sound = new SoundSettings();
-		public readonly GraphicSettings Graphics = new GraphicSettings();
-		public readonly ServerSettings Server = new ServerSettings();
-		public readonly DebugSettings Debug = new DebugSettings();
-		internal Dictionary<string, Hotkey> Keys = new Dictionary<string, Hotkey>();
+		public readonly PlayerSettings Player = new();
+		public readonly GameSettings Game = new();
+		public readonly SoundSettings Sound = new();
+		public readonly GraphicSettings Graphics = new();
+		public readonly ServerSettings Server = new();
+		public readonly DebugSettings Debug = new();
+		internal Dictionary<string, Hotkey> Keys = new();
 
 		public readonly Dictionary<string, object> Sections;
 
 		// A direct clone of the file loaded from disk.
 		// Any changed settings will be merged over this on save,
 		// allowing us to persist any unknown configuration keys
-		readonly List<MiniYamlNode> yamlCache = new List<MiniYamlNode>();
+		readonly List<MiniYamlNode> yamlCache = new();
 
 		public Settings(string file, Arguments args)
 		{

OpenRA.Game/Sound/Sound.cs

@@ -43,8 +43,8 @@ namespace OpenRA
 		ISoundSource videoSource;
 		ISound music;
 		ISound video;
-		readonly Dictionary<uint, ISound> currentSounds = new Dictionary<uint, ISound>();
-		readonly Dictionary<string, ISound> currentNotifications = new Dictionary<string, ISound>();
+		readonly Dictionary<uint, ISound> currentSounds = new();
+		readonly Dictionary<string, ISound> currentNotifications = new();
 		public bool DummyEngine { get; }
 
 		public Sound(IPlatform platform, SoundSettings soundSettings)

OpenRA.Game/Support/Arguments.cs

@@ -16,9 +16,9 @@ namespace OpenRA
 {
 	public class Arguments
 	{
-		readonly Dictionary<string, string> args = new Dictionary<string, string>();
+		readonly Dictionary<string, string> args = new();
 
-		public static Arguments Empty => new Arguments();
+		public static Arguments Empty => new();
 
 		public Arguments(params string[] src)
 		{

OpenRA.Game/Support/AssemblyLoader.cs

@@ -53,8 +53,8 @@ namespace OpenRA.Support
 
 	public class AssemblyLoadContextBuilder
 	{
-		readonly Dictionary<string, ManagedLibrary> managedLibraries = new Dictionary<string, ManagedLibrary>(StringComparer.Ordinal);
-		readonly Dictionary<string, NativeLibrary> nativeLibraries = new Dictionary<string, NativeLibrary>(StringComparer.Ordinal);
+		readonly Dictionary<string, ManagedLibrary> managedLibraries = new(StringComparer.Ordinal);
+		readonly Dictionary<string, NativeLibrary> nativeLibraries = new(StringComparer.Ordinal);
 		string basePath;
 
 		public AssemblyLoadContext Build()

OpenRA.Game/Support/Benchmark.cs

@@ -16,7 +16,7 @@ namespace OpenRA.Support
 	class Benchmark
 	{
 		readonly string prefix;
-		readonly Dictionary<string, List<BenchmarkPoint>> samples = new Dictionary<string, List<BenchmarkPoint>>();
+		readonly Dictionary<string, List<BenchmarkPoint>> samples = new();
 
 		public Benchmark(string prefix)
 		{

OpenRA.Game/Support/Evaluator.cs

@@ -80,7 +80,7 @@ namespace OpenRA.Support
 		}
 
 		static readonly Dictionary<string, int> Prec
-			= new Dictionary<string, int> { { "+", 0 }, { "-", 0 }, { "*", 1 }, { "/", 1 }, { "(", -1 } };
+			= new() { { "+", 0 }, { "-", 0 }, { "*", 1 }, { "/", 1 }, { "(", -1 } };
 
 		static IEnumerable<string> Tokens(string expr, string ops)
 		{

OpenRA.Game/Support/HttpClientFactory.cs

@@ -21,7 +21,7 @@ namespace OpenRA.Support
 		static readonly TimeSpan ConnectionLifeTime = TimeSpan.FromMinutes(1);
 #endif
 
-		static readonly Lazy<HttpMessageHandler> Handler = new Lazy<HttpMessageHandler>(GetHandler);
+		static readonly Lazy<HttpMessageHandler> Handler = new(GetHandler);
 
 		public static HttpClient Create()
 		{

OpenRA.Game/Support/HttpQueryBuilder.cs

@@ -19,7 +19,7 @@ namespace OpenRA.Support
 	public class HttpQueryBuilder : IEnumerable
 	{
 		readonly string url;
-		readonly List<Parameter> parameters = new List<Parameter>();
+		readonly List<Parameter> parameters = new();
 
 		public HttpQueryBuilder(string url)
 		{

OpenRA.Game/Support/Log.cs

@@ -41,10 +41,10 @@ namespace OpenRA
 	{
 		const int CreateLogFileMaxRetryCount = 128;
 
-		static readonly ConcurrentDictionary<string, ChannelInfo> Channels = new ConcurrentDictionary<string, ChannelInfo>();
+		static readonly ConcurrentDictionary<string, ChannelInfo> Channels = new();
 		static readonly Channel<ChannelData> Channel;
 		static readonly ChannelWriter<ChannelData> ChannelWriter;
-		static readonly CancellationTokenSource CancellationToken = new CancellationTokenSource();
+		static readonly CancellationTokenSource CancellationToken = new();
 
 		static readonly TimeSpan FlushInterval = TimeSpan.FromSeconds(5);
 		static readonly Timer Timer;

OpenRA.Game/Support/PerfHistory.cs

@@ -28,7 +28,7 @@ namespace OpenRA.Support
 
 		static int nextColor;
 
-		public static Cache<string, PerfItem> Items = new Cache<string, PerfItem>(
+		public static Cache<string, PerfItem> Items = new(
 			s =>
 			{
 				var x = new PerfItem(s, Colors[nextColor++]);

OpenRA.Game/Support/PerfTimer.cs

@@ -31,7 +31,7 @@ namespace OpenRA.Support
 		List<PerfTimer> children;
 		long ticks;
 
-		static readonly ThreadLocal<PerfTimer> ParentThreadLocal = new ThreadLocal<PerfTimer>();
+		static readonly ThreadLocal<PerfTimer> ParentThreadLocal = new();
 
 		public PerfTimer(string name, float thresholdMs = 0)
 		{

OpenRA.Game/Support/VariableExpression.cs

@@ -24,7 +24,7 @@ namespace OpenRA.Support
 		public static readonly IReadOnlyDictionary<string, int> NoVariables = new ReadOnlyDictionary<string, int>(new Dictionary<string, int>());
 
 		public readonly string Expression;
-		readonly HashSet<string> variables = new HashSet<string>();
+		readonly HashSet<string> variables = new();
 		public IEnumerable<string> Variables => variables;
 
 		enum CharClass { Whitespace, Operator, Mixed, Id, Digit }
@@ -716,8 +716,8 @@ namespace OpenRA.Support
 
 		class AstStack
 		{
-			readonly List<Expression> expressions = new List<Expression>();
-			readonly List<ExpressionType> types = new List<ExpressionType>();
+			readonly List<Expression> expressions = new();
+			readonly List<ExpressionType> types = new();
 
 			public ExpressionType PeekType() { return types[^1]; }
 
@@ -774,7 +774,7 @@ namespace OpenRA.Support
 
 		class Compiler
 		{
-			readonly AstStack ast = new AstStack();
+			readonly AstStack ast = new();
 
 			public Expression Build(Token[] postfix, ExpressionType resultType)
 			{

OpenRA.Game/Sync.cs

@@ -28,7 +28,7 @@ namespace OpenRA
 	public static class Sync
 	{
 		static readonly ConcurrentCache<Type, Func<object, int>> HashFunctions =
-			new ConcurrentCache<Type, Func<object, int>>(GenerateHashFunc);
+			new(GenerateHashFunc);
 
 		internal static Func<object, int> GetHashFunction(ISync sync)
 		{
@@ -40,7 +40,7 @@ namespace OpenRA
 			return GetHashFunction(sync)(sync);
 		}
 
-		static readonly Dictionary<Type, MethodInfo> CustomHashFunctions = new Dictionary<Type, MethodInfo>()
+		static readonly Dictionary<Type, MethodInfo> CustomHashFunctions = new()
 		{
 			{ typeof(int2), ((Func<int2, int>)HashInt2).Method },
 			{ typeof(CPos), ((Func<CPos, int>)HashCPos).Method },

OpenRA.Game/TextNotificationsManager.cs

@@ -21,9 +21,9 @@ namespace OpenRA
 		static readonly string SystemMessageLabel;
 
 		public static long ChatDisabledUntil { get; internal set; }
-		public static readonly Dictionary<int, bool> MutedPlayers = new Dictionary<int, bool>();
+		public static readonly Dictionary<int, bool> MutedPlayers = new();
 
-		static readonly List<TextNotification> NotificationsCache = new List<TextNotification>();
+		static readonly List<TextNotification> NotificationsCache = new();
 		public static IReadOnlyList<TextNotification> Notifications => NotificationsCache;
 
 		static TextNotificationsManager()

OpenRA.Game/TraitDictionary.cs

@@ -44,7 +44,7 @@ namespace OpenRA
 		static readonly Func<Type, ITraitContainer> CreateTraitContainer = t =>
 			(ITraitContainer)typeof(TraitContainer<>).MakeGenericType(t).GetConstructor(Type.EmptyTypes).Invoke(null);
 
-		readonly Dictionary<Type, ITraitContainer> traits = new Dictionary<Type, ITraitContainer>();
+		readonly Dictionary<Type, ITraitContainer> traits = new();
 
 		ITraitContainer InnerGet(Type t)
 		{
@@ -143,9 +143,9 @@ namespace OpenRA
 
 		class TraitContainer<T> : ITraitContainer
 		{
-			readonly List<Actor> actors = new List<Actor>();
-			readonly List<T> traits = new List<T>();
-			readonly PerfTickLogger perfLogger = new PerfTickLogger();
+			readonly List<Actor> actors = new();
+			readonly List<T> traits = new();
+			readonly PerfTickLogger perfLogger = new();
 
 			public int Queries { get; private set; }
 
@@ -277,7 +277,7 @@ namespace OpenRA
 
 				public void Reset() { index = -1; }
 				public bool MoveNext() { return ++index < actors.Count; }
-				public TraitPair<T> Current => new TraitPair<T>(actors[index], traits[index]);
+				public TraitPair<T> Current => new(actors[index], traits[index]);
 				object System.Collections.IEnumerator.Current => Current;
 				public void Dispose() { }
 			}

OpenRA.Game/Traits/Player/FrozenActorLayer.cs

@@ -39,7 +39,7 @@ namespace OpenRA.Traits
 		readonly Actor actor;
 		readonly ICreatesFrozenActors frozenTrait;
 		readonly Shroud shroud;
-		readonly List<WPos> targetablePositions = new List<WPos>();
+		readonly List<WPos> targetablePositions = new();
 
 		public Player Viewer { get; }
 		public Player Owner { get; private set; }
@@ -253,7 +253,7 @@ namespace OpenRA.Traits
 		readonly Player owner;
 		readonly Dictionary<uint, FrozenActor> frozenActorsById;
 		readonly SpatiallyPartitioned<uint> partitionedFrozenActorIds;
-		readonly HashSet<uint> dirtyFrozenActorIds = new HashSet<uint>();
+		readonly HashSet<uint> dirtyFrozenActorIds = new();
 
 		public FrozenActorLayer(Actor self, FrozenActorLayerInfo info)
 		{

OpenRA.Game/Traits/Player/Shroud.cs

@@ -98,7 +98,7 @@ namespace OpenRA.Traits
 		readonly Map map;
 
 		// Individual shroud modifier sources (type and area)
-		readonly Dictionary<object, ShroudSource> sources = new Dictionary<object, ShroudSource>();
+		readonly Dictionary<object, ShroudSource> sources = new();
 
 		// Per-cell count of each source type, used to resolve the final cell type
 		readonly ProjectedCellLayer<short> passiveVisibleCount;

OpenRA.Game/Traits/TraitsInterfaces.cs

@@ -563,7 +563,7 @@ namespace OpenRA.Traits
 
 	public class LobbyBooleanOption : LobbyOption
 	{
-		static readonly Dictionary<string, string> BoolValues = new Dictionary<string, string>()
+		static readonly Dictionary<string, string> BoolValues = new()
 		{
 			{ true.ToString(), "Enabled" },
 			{ false.ToString(), "Disabled" }

OpenRA.Game/Traits/World/Faction.cs

@@ -24,7 +24,7 @@ namespace OpenRA.Traits
 		public readonly string InternalName = null;
 
 		[Desc("Pick a random faction as the player's faction out of this list.")]
-		public readonly HashSet<string> RandomFactionMembers = new HashSet<string>();
+		public readonly HashSet<string> RandomFactionMembers = new();
 
 		[Desc("The side that the faction belongs to. For example, England belongs to the 'Allies' side.")]
 		public readonly string Side = null;

OpenRA.Game/Traits/World/ScreenMap.cs

@@ -47,15 +47,15 @@ namespace OpenRA.Traits
 		readonly Func<Actor, ActorBoundsPair> selectActorAndBounds;
 		readonly Cache<Player, SpatiallyPartitioned<FrozenActor>> partitionedMouseFrozenActors;
 		readonly SpatiallyPartitioned<Actor> partitionedMouseActors;
-		readonly Dictionary<Actor, ActorBoundsPair> partitionedMouseActorBounds = new Dictionary<Actor, ActorBoundsPair>();
+		readonly Dictionary<Actor, ActorBoundsPair> partitionedMouseActorBounds = new();
 
 		readonly Cache<Player, SpatiallyPartitioned<FrozenActor>> partitionedRenderableFrozenActors;
 		readonly SpatiallyPartitioned<Actor> partitionedRenderableActors;
 		readonly SpatiallyPartitioned<IEffect> partitionedRenderableEffects;
 
 		// Updates are done in one pass to ensure all bound changes have been applied
-		readonly HashSet<Actor> addOrUpdateActors = new HashSet<Actor>();
-		readonly HashSet<Actor> removeActors = new HashSet<Actor>();
+		readonly HashSet<Actor> addOrUpdateActors = new();
+		readonly HashSet<Actor> removeActors = new();
 		readonly Cache<Player, HashSet<FrozenActor>> addOrUpdateFrozenActors;
 		readonly Cache<Player, HashSet<FrozenActor>> removeFrozenActors;
 

OpenRA.Game/Traits/World/ScreenShaker.cs

@@ -19,8 +19,8 @@ namespace OpenRA.Traits
 	[TraitLocation(SystemActors.World)]
 	public class ScreenShakerInfo : TraitInfo
 	{
-		public readonly float2 MinMultiplier = new float2(-3, -3);
-		public readonly float2 MaxMultiplier = new float2(3, 3);
+		public readonly float2 MinMultiplier = new(-3, -3);
+		public readonly float2 MaxMultiplier = new(3, 3);
 
 		public override object Create(ActorInitializer init) { return new ScreenShaker(this); }
 	}
@@ -29,7 +29,7 @@ namespace OpenRA.Traits
 	{
 		readonly ScreenShakerInfo info;
 		WorldRenderer worldRenderer;
-		readonly List<ShakeEffect> shakeEffects = new List<ShakeEffect>();
+		readonly List<ShakeEffect> shakeEffects = new();
 		int ticks = 0;
 
 		public ScreenShaker(ScreenShakerInfo info)

OpenRA.Game/WAngle.cs

@@ -31,7 +31,7 @@ namespace OpenRA
 				Angle += 1024;
 		}
 
-		public static readonly WAngle Zero = new WAngle(0);
+		public static readonly WAngle Zero = new(0);
 		public static WAngle FromFacing(int facing) { return new WAngle(facing * 4); }
 		public static WAngle FromDegrees(int degrees) { return new WAngle(degrees * 1024 / 360); }
 		public static WAngle operator +(WAngle a, WAngle b) { return new WAngle(a.Angle + b.Angle); }

OpenRA.Game/WDist.cs

@@ -27,8 +27,8 @@ namespace OpenRA
 		public long LengthSquared => (long)Length * Length;
 
 		public WDist(int r) { Length = r; }
-		public static readonly WDist Zero = new WDist(0);
-		public static readonly WDist MaxValue = new WDist(int.MaxValue);
+		public static readonly WDist Zero = new(0);
+		public static readonly WDist MaxValue = new(int.MaxValue);
 		public static WDist FromCells(int cells) { return new WDist(1024 * cells); }
 
 		public static WDist operator +(WDist a, WDist b) { return new WDist(a.Length + b.Length); }

OpenRA.Game/WPos.cs

@@ -25,7 +25,7 @@ namespace OpenRA
 		public WPos(int x, int y, int z) { X = x; Y = y; Z = z; }
 		public WPos(WDist x, WDist y, WDist z) { X = x.Length; Y = y.Length; Z = z.Length; }
 
-		public static readonly WPos Zero = new WPos(0, 0, 0);
+		public static readonly WPos Zero = new(0, 0, 0);
 
 		public static explicit operator WVec(in WPos a) { return new WVec(a.X, a.Y, a.Z); }
 

OpenRA.Game/WRot.cs

@@ -105,7 +105,7 @@ namespace OpenRA
 			Yaw = yaw;
 		}
 
-		public static readonly WRot None = new WRot(WAngle.Zero, WAngle.Zero, WAngle.Zero);
+		public static readonly WRot None = new(WAngle.Zero, WAngle.Zero, WAngle.Zero);
 
 		public static WRot FromFacing(int facing) { return new WRot(WAngle.Zero, WAngle.Zero, WAngle.FromFacing(facing)); }
 		public static WRot FromYaw(WAngle yaw) { return new WRot(WAngle.Zero, WAngle.Zero, yaw); }

OpenRA.Game/WVec.cs

@@ -24,7 +24,7 @@ namespace OpenRA
 		public WVec(int x, int y, int z) { X = x; Y = y; Z = z; }
 		public WVec(WDist x, WDist y, WDist z) { X = x.Length; Y = y.Length; Z = z.Length; }
 
-		public static readonly WVec Zero = new WVec(0, 0, 0);
+		public static readonly WVec Zero = new(0, 0, 0);
 
 		public static WVec operator +(in WVec a, in WVec b) { return new WVec(a.X + b.X, a.Y + b.Y, a.Z + b.Z); }
 		public static WVec operator -(in WVec a, in WVec b) { return new WVec(a.X - b.X, a.Y - b.Y, a.Z - b.Z); }

OpenRA.Game/Widgets/ChromeMetrics.cs

@@ -16,7 +16,7 @@ namespace OpenRA.Widgets
 {
 	public static class ChromeMetrics
 	{
-		static Dictionary<string, string> data = new Dictionary<string, string>();
+		static Dictionary<string, string> data = new();
 
 		public static void Initialize(ModData modData)
 		{

OpenRA.Game/Widgets/Widget.cs

@@ -25,15 +25,15 @@ namespace OpenRA.Widgets
 
 		public static Widget Root = new ContainerWidget();
 
-		public static TickTime LastTickTime = new TickTime(() => Timestep, Game.RunTime);
+		public static TickTime LastTickTime = new(() => Timestep, Game.RunTime);
 
-		static readonly Stack<Widget> WindowList = new Stack<Widget>();
+		static readonly Stack<Widget> WindowList = new();
 
 		public static Widget MouseFocusWidget;
 		public static Widget KeyboardFocusWidget;
 		public static Widget MouseOverWidget;
 
-		static readonly Mediator Mediator = new Mediator();
+		static readonly Mediator Mediator = new();
 
 		public static void CloseWindow()
 		{
@@ -185,7 +185,7 @@ namespace OpenRA.Widgets
 	{
 		string defaultCursor = null;
 
-		public readonly List<Widget> Children = new List<Widget>();
+		public readonly List<Widget> Children = new();
 
 		// Info defined in YAML
 		public string Id = null;
@@ -644,7 +644,7 @@ namespace OpenRA.Widgets
 
 	public sealed class Mediator
 	{
-		readonly TypeDictionary types = new TypeDictionary();
+		readonly TypeDictionary types = new();
 
 		public void Subscribe<T>(T instance)
 		{

OpenRA.Game/Widgets/WidgetLoader.cs

@@ -18,7 +18,7 @@ namespace OpenRA
 {
 	public class WidgetLoader
 	{
-		readonly Dictionary<string, MiniYamlNode> widgets = new Dictionary<string, MiniYamlNode>();
+		readonly Dictionary<string, MiniYamlNode> widgets = new();
 		readonly ModData modData;
 
 		public WidgetLoader(ModData modData)

OpenRA.Game/World.cs

@@ -28,15 +28,15 @@ namespace OpenRA
 
 	public sealed class World : IDisposable
 	{
-		internal readonly TraitDictionary TraitDict = new TraitDictionary();
-		readonly SortedDictionary<uint, Actor> actors = new SortedDictionary<uint, Actor>();
-		readonly List<IEffect> effects = new List<IEffect>();
-		readonly List<IEffect> unpartitionedEffects = new List<IEffect>();
-		readonly List<ISync> syncedEffects = new List<ISync>();
+		internal readonly TraitDictionary TraitDict = new();
+		readonly SortedDictionary<uint, Actor> actors = new();
+		readonly List<IEffect> effects = new();
+		readonly List<IEffect> unpartitionedEffects = new();
+		readonly List<ISync> syncedEffects = new();
 		readonly GameSettings gameSettings;
 		readonly ModData modData;
 
-		readonly Queue<Action<World>> frameEndActions = new Queue<Action<World>>();
+		readonly Queue<Action<World>> frameEndActions = new();
 
 		public readonly GameSpeed GameSpeed;
 
@@ -390,7 +390,7 @@ namespace OpenRA
 
 		public int WorldTick { get; private set; }
 
-		readonly Dictionary<int, MiniYaml> gameSaveTraitData = new Dictionary<int, MiniYaml>();
+		readonly Dictionary<int, MiniYaml> gameSaveTraitData = new();
 		internal void AddGameSaveTraitData(int traitIndex, MiniYaml yaml)
 		{
 			gameSaveTraitData[traitIndex] = yaml;

OpenRA.Game/WorldViewportSizes.cs

@@ -15,16 +15,16 @@ namespace OpenRA
 {
 	public class WorldViewportSizes : IGlobalModData
 	{
-		public readonly int2 CloseWindowHeights = new int2(480, 600);
-		public readonly int2 MediumWindowHeights = new int2(600, 900);
-		public readonly int2 FarWindowHeights = new int2(900, 1300);
+		public readonly int2 CloseWindowHeights = new(480, 600);
+		public readonly int2 MediumWindowHeights = new(600, 900);
+		public readonly int2 FarWindowHeights = new(900, 1300);
 
 		public readonly float DefaultScale = 1.0f;
 		public readonly float MaxZoomScale = 2.0f;
 		public readonly int MaxZoomWindowHeight = 240;
 		public readonly bool AllowNativeZoom = true;
 
-		public readonly Size MinEffectiveResolution = new Size(1024, 720);
+		public readonly Size MinEffectiveResolution = new(1024, 720);
 
 		public int2 GetSizeRange(WorldViewport distance)
 		{

OpenRA.Mods.Cnc/FileFormats/BlowfishKeyProvider.cs

@@ -27,7 +27,7 @@ namespace OpenRA.Mods.Cnc.FileFormats
 			public uint Len;
 		}
 
-		readonly PublicKey pubkey = new PublicKey();
+		readonly PublicKey pubkey = new();
 
 		readonly uint[] globOne = new uint[64];
 		uint globOneBitLen, globOneLenXTwo;

OpenRA.Mods.Cnc/FileSystem/BigFile.cs

@@ -25,7 +25,7 @@ namespace OpenRA.Mods.Cnc.FileSystem
 			public string Name { get; }
 			public IEnumerable<string> Contents => index.Keys;
 
-			readonly Dictionary<string, Entry> index = new Dictionary<string, Entry>();
+			readonly Dictionary<string, Entry> index = new();
 			readonly Stream s;
 
 			public BigFile(Stream s, string filename)