Fix IDE0090

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)