diff --git a/.editorconfig b/.editorconfig
index b7b73db086..af8c093926 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -72,7 +72,7 @@ dotnet_diagnostic.IDE0211.severity = warning
 
 # IDE0290 Use primary constructor
 #csharp_style_prefer_primary_constructors = true
-dotnet_diagnostic.IDE0290.severity = suggestion # TODO: Consider enabling
+dotnet_diagnostic.IDE0290.severity = silent
 
 # IDE0330 Prefer 'System.Threading.Lock'
 #csharp_prefer_system_threading_lock = true
diff --git a/OpenRA.Game/FieldLoader.cs b/OpenRA.Game/FieldLoader.cs
index c81a71a9a8..c65623d8c9 100644
--- a/OpenRA.Game/FieldLoader.cs
+++ b/OpenRA.Game/FieldLoader.cs
@@ -841,9 +841,8 @@ namespace OpenRA
 
 	// Mirrors DescriptionAttribute from System.ComponentModel but we don't want to have to use that everywhere.
 	[AttributeUsage(AttributeTargets.All)]
-	public sealed class DescAttribute : Attribute
+	public sealed class DescAttribute(params string[] lines) : Attribute
 	{
-		public readonly string[] Lines;
-		public DescAttribute(params string[] lines) { Lines = lines; }
+		public readonly string[] Lines = lines;
 	}
 }
diff --git a/OpenRA.Game/Graphics/Model.cs b/OpenRA.Game/Graphics/Model.cs
index b49e0e5d91..362cf34dee 100644
--- a/OpenRA.Game/Graphics/Model.cs
+++ b/OpenRA.Game/Graphics/Model.cs
@@ -37,19 +37,7 @@ namespace OpenRA.Graphics
 			Func<float> getScale, Func<IModel> getVoxel, Func<WRot> getRotation);
 	}
 
-	public readonly struct ModelRenderData
-	{
-		public readonly int Start;
-		public readonly int Count;
-		public readonly Sheet Sheet;
-
-		public ModelRenderData(int start, int count, Sheet sheet)
-		{
-			Start = start;
-			Count = count;
-			Sheet = sheet;
-		}
-	}
+	public readonly record struct ModelRenderData(int Start, int Count, Sheet Sheet);
 
 	public interface IModelCacheInfo : ITraitInfoInterface { }
 
diff --git a/OpenRA.Game/Graphics/PlatformInterfaces.cs b/OpenRA.Game/Graphics/PlatformInterfaces.cs
index f9aa7c5f89..fd31b6409a 100644
--- a/OpenRA.Game/Graphics/PlatformInterfaces.cs
+++ b/OpenRA.Game/Graphics/PlatformInterfaces.cs
@@ -179,12 +179,6 @@ namespace OpenRA
 		TriangleList,
 	}
 
-	public readonly struct Range<T>
-	{
-		public readonly T Start, End;
-		public Range(T start, T end) { Start = start; End = end; }
-	}
-
 	public enum WindowMode
 	{
 		Windowed,
diff --git a/OpenRA.Game/Graphics/RenderPostProcessPassVertex.cs b/OpenRA.Game/Graphics/RenderPostProcessPassVertex.cs
index 364b2c9c05..abea0d223f 100644
--- a/OpenRA.Game/Graphics/RenderPostProcessPassVertex.cs
+++ b/OpenRA.Game/Graphics/RenderPostProcessPassVertex.cs
@@ -14,29 +14,10 @@ using System.Runtime.InteropServices;
 namespace OpenRA.Graphics
 {
 	[StructLayout(LayoutKind.Sequential)]
-	public readonly struct RenderPostProcessPassVertex
-	{
-		public readonly float X, Y;
-
-		public RenderPostProcessPassVertex(float x, float y)
-		{
-			X = x; Y = y;
-		}
-	}
+	public readonly record struct RenderPostProcessPassVertex(float X, float Y);
 
 	[StructLayout(LayoutKind.Sequential)]
-	public readonly struct RenderPostProcessPassTexturedVertex
-	{
-		// 3d position
-		public readonly float X, Y;
-		public readonly float S, T;
-
-		public RenderPostProcessPassTexturedVertex(float x, float y, float s, float t)
-		{
-			X = x; Y = y;
-			S = s; T = t;
-		}
-	}
+	public readonly record struct RenderPostProcessPassTexturedVertex(float X, float Y, float S, float T);
 
 	public sealed class RenderPostProcessPassShaderBindings : ShaderBindings
 	{
diff --git a/OpenRA.Game/Graphics/ShaderBindings.cs b/OpenRA.Game/Graphics/ShaderBindings.cs
index 6e11b3a63d..1c3f854e2c 100644
--- a/OpenRA.Game/Graphics/ShaderBindings.cs
+++ b/OpenRA.Game/Graphics/ShaderBindings.cs
@@ -23,21 +23,7 @@ namespace OpenRA.Graphics
 		UInt = 0x1405 // GL_UNSIGNED_INT
 	}
 
-	public readonly struct ShaderVertexAttribute
-	{
-		public readonly string Name;
-		public readonly ShaderVertexAttributeType Type;
-		public readonly int Components;
-		public readonly int Offset;
-
-		public ShaderVertexAttribute(string name, ShaderVertexAttributeType type, int components, int offset)
-		{
-			Name = name;
-			Type = type;
-			Components = components;
-			Offset = offset;
-		}
-	}
+	public readonly record struct ShaderVertexAttribute(string Name, ShaderVertexAttributeType Type, int Components, int Offset);
 
 	public abstract class ShaderBindings : IShaderBindings
 	{
diff --git a/OpenRA.Game/Input/IInputHandler.cs b/OpenRA.Game/Input/IInputHandler.cs
index 0470c5f239..01d64a087d 100644
--- a/OpenRA.Game/Input/IInputHandler.cs
+++ b/OpenRA.Game/Input/IInputHandler.cs
@@ -23,25 +23,7 @@ namespace OpenRA
 	}
 
 	public enum MouseInputEvent { Down, Move, Up, Scroll }
-	public struct MouseInput
-	{
-		public MouseInputEvent Event;
-		public MouseButton Button;
-		public int2 Location;
-		public int2 Delta;
-		public Modifiers Modifiers;
-		public int MultiTapCount;
-
-		public MouseInput(MouseInputEvent ev, MouseButton button, int2 location, int2 delta, Modifiers mods, int multiTapCount)
-		{
-			Event = ev;
-			Button = button;
-			Location = location;
-			Delta = delta;
-			Modifiers = mods;
-			MultiTapCount = multiTapCount;
-		}
-	}
+	public record struct MouseInput(MouseInputEvent Event, MouseButton Button, int2 Location, int2 Delta, Modifiers Modifiers, int MultiTapCount);
 
 	[Flags]
 	public enum MouseButton
diff --git a/OpenRA.Game/Map/ActorInitializer.cs b/OpenRA.Game/Map/ActorInitializer.cs
index 7382fca43a..fa8e9711c8 100644
--- a/OpenRA.Game/Map/ActorInitializer.cs
+++ b/OpenRA.Game/Map/ActorInitializer.cs
@@ -216,10 +216,8 @@ namespace OpenRA
 		}
 	}
 
-	public class LocationInit : ValueActorInit<CPos>, ISingleInstanceInit
+	public class LocationInit(CPos value) : ValueActorInit<CPos>(value), ISingleInstanceInit
 	{
-		public LocationInit(CPos value)
-			: base(value) { }
 	}
 
 	public class OwnerInit : ActorInit, ISingleInstanceInit
diff --git a/OpenRA.Game/Map/TileReference.cs b/OpenRA.Game/Map/TileReference.cs
index 1d3c44d4a1..7a687dbc48 100644
--- a/OpenRA.Game/Map/TileReference.cs
+++ b/OpenRA.Game/Map/TileReference.cs
@@ -11,16 +11,10 @@
 
 namespace OpenRA
 {
-	public readonly struct TerrainTile
+	public readonly struct TerrainTile(ushort type, byte index)
 	{
-		public readonly ushort Type;
-		public readonly byte Index;
-
-		public TerrainTile(ushort type, byte index)
-		{
-			Type = type;
-			Index = index;
-		}
+		public readonly ushort Type = type;
+		public readonly byte Index = index;
 
 		public override int GetHashCode() { return Type.GetHashCode() ^ Index.GetHashCode(); }
 
@@ -42,16 +36,10 @@ namespace OpenRA
 		}
 	}
 
-	public readonly struct ResourceTile
+	public readonly struct ResourceTile(byte type, byte index)
 	{
-		public readonly byte Type;
-		public readonly byte Index;
-
-		public ResourceTile(byte type, byte index)
-		{
-			Type = type;
-			Index = index;
-		}
+		public readonly byte Type = type;
+		public readonly byte Index = index;
 
 		public override int GetHashCode() { return Type.GetHashCode() ^ Index.GetHashCode(); }
 	}
diff --git a/OpenRA.Game/MiniYaml.cs b/OpenRA.Game/MiniYaml.cs
index d368190f18..b8b70f662b 100644
--- a/OpenRA.Game/MiniYaml.cs
+++ b/OpenRA.Game/MiniYaml.cs
@@ -59,16 +59,10 @@ namespace OpenRA
 
 	public sealed class MiniYamlNode
 	{
-		public readonly struct SourceLocation
+		public readonly struct SourceLocation(string name, int line)
 		{
-			public readonly string Name;
-			public readonly int Line;
-
-			public SourceLocation(string name, int line)
-			{
-				Name = name;
-				Line = line;
-			}
+			public readonly string Name = name;
+			public readonly int Line = line;
 
 			public override string ToString() { return $"{Name}:{Line}"; }
 		}
diff --git a/OpenRA.Game/PlayerProfile.cs b/OpenRA.Game/PlayerProfile.cs
index b9a74a8efd..9a8dbb7767 100644
--- a/OpenRA.Game/PlayerProfile.cs
+++ b/OpenRA.Game/PlayerProfile.cs
@@ -54,19 +54,5 @@ namespace OpenRA
 		}
 	}
 
-	public class PlayerBadge
-	{
-		public readonly string Label;
-		public readonly string Icon;
-		public readonly string Icon2x;
-		public readonly string Icon3x;
-
-		public PlayerBadge(string label, string icon, string icon2x, string icon3x)
-		{
-			Label = label;
-			Icon = icon;
-			Icon2x = icon2x;
-			Icon3x = icon3x;
-		}
-	}
+	public record PlayerBadge(string Label, string Icon, string Icon2x, string Icon3x);
 }
diff --git a/OpenRA.Game/Scripting/ScriptContext.cs b/OpenRA.Game/Scripting/ScriptContext.cs
index fd7480e561..3d8500aeeb 100644
--- a/OpenRA.Game/Scripting/ScriptContext.cs
+++ b/OpenRA.Game/Scripting/ScriptContext.cs
@@ -33,10 +33,9 @@ namespace OpenRA.Scripting
 
 	// For traitinfos that provide actor / player commands
 	[AttributeUsage(AttributeTargets.Class)]
-	public sealed class ScriptPropertyGroupAttribute : Attribute
+	public sealed class ScriptPropertyGroupAttribute(string category) : Attribute
 	{
-		public readonly string Category;
-		public ScriptPropertyGroupAttribute(string category) { Category = category; }
+		public readonly string Category = category;
 	}
 
 	// For property groups that are safe to initialize invoke on destroyed actors
@@ -46,28 +45,16 @@ namespace OpenRA.Scripting
 	[AttributeUsage(AttributeTargets.Property | AttributeTargets.Method)]
 	public sealed class ScriptActorPropertyActivityAttribute : Attribute { }
 
-	public abstract class ScriptActorProperties
+	public abstract class ScriptActorProperties(ScriptContext context, Actor self)
 	{
-		protected readonly Actor Self;
-		protected readonly ScriptContext Context;
-
-		protected ScriptActorProperties(ScriptContext context, Actor self)
-		{
-			Self = self;
-			Context = context;
-		}
+		protected readonly Actor Self = self;
+		protected readonly ScriptContext Context = context;
 	}
 
-	public abstract class ScriptPlayerProperties
+	public abstract class ScriptPlayerProperties(ScriptContext context, Player player)
 	{
-		protected readonly Player Player;
-		protected readonly ScriptContext Context;
-
-		protected ScriptPlayerProperties(ScriptContext context, Player player)
-		{
-			Player = player;
-			Context = context;
-		}
+		protected readonly Player Player = player;
+		protected readonly ScriptContext Context = context;
 	}
 
 	/// <summary>
@@ -124,10 +111,9 @@ namespace OpenRA.Scripting
 	}
 
 	[AttributeUsage(AttributeTargets.Class)]
-	public sealed class ScriptGlobalAttribute : Attribute
+	public sealed class ScriptGlobalAttribute(string name) : Attribute
 	{
-		public readonly string Name;
-		public ScriptGlobalAttribute(string name) { Name = name; }
+		public readonly string Name = name;
 	}
 
 	public sealed class ScriptContext : IDisposable
diff --git a/OpenRA.Game/Sound/SoundDevice.cs b/OpenRA.Game/Sound/SoundDevice.cs
index 6f1ba86f18..5cf8fd4174 100644
--- a/OpenRA.Game/Sound/SoundDevice.cs
+++ b/OpenRA.Game/Sound/SoundDevice.cs
@@ -32,17 +32,7 @@ namespace OpenRA
 		void SetSoundPosition(ISound sound, WPos position);
 	}
 
-	public class SoundDevice
-	{
-		public readonly string Device;
-		public readonly string Label;
-
-		public SoundDevice(string device, string label)
-		{
-			Device = device;
-			Label = label;
-		}
-	}
+	public record SoundDevice(string Device, string Label);
 
 	public interface ISoundSource : IDisposable { }
 
diff --git a/OpenRA.Game/Support/Benchmark.cs b/OpenRA.Game/Support/Benchmark.cs
index 9dba345f07..6eaa71e3db 100644
--- a/OpenRA.Game/Support/Benchmark.cs
+++ b/OpenRA.Game/Support/Benchmark.cs
@@ -30,17 +30,7 @@ namespace OpenRA.Support
 				samples.GetOrAdd(item.Key).Add(new BenchmarkPoint(localTick, item.Value.LastValue));
 		}
 
-		sealed class BenchmarkPoint
-		{
-			public int Tick { get; }
-			public double Value { get; }
-
-			public BenchmarkPoint(int tick, double value)
-			{
-				Tick = tick;
-				Value = value;
-			}
-		}
+		readonly record struct BenchmarkPoint(int Tick, double Value);
 
 		public void Write()
 		{
diff --git a/OpenRA.Game/Support/Log.cs b/OpenRA.Game/Support/Log.cs
index 037d99f328..ec56ecc05c 100644
--- a/OpenRA.Game/Support/Log.cs
+++ b/OpenRA.Game/Support/Log.cs
@@ -26,17 +26,7 @@ namespace OpenRA
 		public TextWriter Writer;
 	}
 
-	readonly struct ChannelData
-	{
-		public readonly string Channel;
-		public readonly string Text;
-
-		public ChannelData(string channel, string text)
-		{
-			Text = text;
-			Channel = channel;
-		}
-	}
+	readonly record struct ChannelData(string Channel, string Text);
 
 	public static class Log
 	{
diff --git a/OpenRA.Game/Traits/LintAttributes.cs b/OpenRA.Game/Traits/LintAttributes.cs
index b631fd2a99..446341daa3 100644
--- a/OpenRA.Game/Traits/LintAttributes.cs
+++ b/OpenRA.Game/Traits/LintAttributes.cs
@@ -46,33 +46,21 @@ namespace OpenRA.Traits
 	public sealed class WeaponReferenceAttribute : Attribute { }
 
 	[AttributeUsage(AttributeTargets.Field)]
-	public sealed class SequenceReferenceAttribute : Attribute
+	public sealed class SequenceReferenceAttribute(
+		string imageReference = null, bool prefix = false, bool allowNullImage = false,
+		LintDictionaryReference dictionaryReference = LintDictionaryReference.None) : Attribute
 	{
 		// The field name in the same trait info that contains the image name.
-		public readonly string ImageReference;
-		public readonly bool Prefix;
-		public readonly bool AllowNullImage;
-		public readonly LintDictionaryReference DictionaryReference;
-
-		public SequenceReferenceAttribute(string imageReference = null, bool prefix = false, bool allowNullImage = false,
-			LintDictionaryReference dictionaryReference = LintDictionaryReference.None)
-		{
-			ImageReference = imageReference;
-			Prefix = prefix;
-			AllowNullImage = allowNullImage;
-			DictionaryReference = dictionaryReference;
-		}
+		public readonly string ImageReference = imageReference;
+		public readonly bool Prefix = prefix;
+		public readonly bool AllowNullImage = allowNullImage;
+		public readonly LintDictionaryReference DictionaryReference = dictionaryReference;
 	}
 
 	[AttributeUsage(AttributeTargets.Field)]
-	public sealed class CursorReferenceAttribute : Attribute
+	public sealed class CursorReferenceAttribute(LintDictionaryReference dictionaryReference = LintDictionaryReference.None) : Attribute
 	{
-		public readonly LintDictionaryReference DictionaryReference;
-
-		public CursorReferenceAttribute(LintDictionaryReference dictionaryReference = LintDictionaryReference.None)
-		{
-			DictionaryReference = dictionaryReference;
-		}
+		public readonly LintDictionaryReference DictionaryReference = dictionaryReference;
 	}
 
 	[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property)]
@@ -82,13 +70,9 @@ namespace OpenRA.Traits
 	public sealed class ConsumedConditionReferenceAttribute : Attribute { }
 
 	[AttributeUsage(AttributeTargets.Field)]
-	public sealed class PaletteDefinitionAttribute : Attribute
+	public sealed class PaletteDefinitionAttribute(bool isPlayerPalette = false) : Attribute
 	{
-		public readonly bool IsPlayerPalette;
-		public PaletteDefinitionAttribute(bool isPlayerPalette = false)
-		{
-			IsPlayerPalette = isPlayerPalette;
-		}
+		public readonly bool IsPlayerPalette = isPlayerPalette;
 	}
 
 	[AttributeUsage(AttributeTargets.Field)]
@@ -108,12 +92,8 @@ namespace OpenRA.Traits
 	}
 
 	[AttributeUsage(AttributeTargets.Class)]
-	public sealed class TraitLocationAttribute : Attribute
+	public sealed class TraitLocationAttribute(SystemActors systemActors) : Attribute
 	{
-		public readonly SystemActors SystemActors;
-		public TraitLocationAttribute(SystemActors systemActors)
-		{
-			SystemActors = systemActors;
-		}
+		public readonly SystemActors SystemActors = systemActors;
 	}
 }
diff --git a/OpenRA.Game/Traits/Player/Shroud.cs b/OpenRA.Game/Traits/Player/Shroud.cs
index 3e850385a2..2da8fb685e 100644
--- a/OpenRA.Game/Traits/Player/Shroud.cs
+++ b/OpenRA.Game/Traits/Player/Shroud.cs
@@ -76,17 +76,7 @@ namespace OpenRA.Traits
 		public int RevealedCells { get; private set; }
 
 		enum ShroudCellType : byte { Shroud, Fog, Visible }
-		sealed class ShroudSource
-		{
-			public readonly SourceType Type;
-			public readonly PPos[] ProjectedCells;
-
-			public ShroudSource(SourceType type, PPos[] projectedCells)
-			{
-				Type = type;
-				ProjectedCells = projectedCells;
-			}
-		}
+		readonly record struct ShroudSource(SourceType Type, PPos[] ProjectedCells);
 
 		// Visible is not a super set of Explored. IsExplored may return false even if IsVisible returns true.
 		[Flags]
diff --git a/OpenRA.Game/Traits/TraitsInterfaces.cs b/OpenRA.Game/Traits/TraitsInterfaces.cs
index b4c34e70fd..91f062abf0 100644
--- a/OpenRA.Game/Traits/TraitsInterfaces.cs
+++ b/OpenRA.Game/Traits/TraitsInterfaces.cs
@@ -628,16 +628,7 @@ namespace OpenRA.Traits
 	public interface IObservesVariablesInfo : ITraitInfoInterface { }
 
 	public delegate void VariableObserverNotifier(Actor self, IReadOnlyDictionary<string, int> variables);
-	public struct VariableObserver
-	{
-		public VariableObserverNotifier Notifier;
-		public IEnumerable<string> Variables;
-		public VariableObserver(VariableObserverNotifier notifier, IEnumerable<string> variables)
-		{
-			Notifier = notifier;
-			Variables = variables;
-		}
-	}
+	public readonly record struct VariableObserver(VariableObserverNotifier Notifier, IEnumerable<string> Variables);
 
 	public interface IObservesVariables
 	{
diff --git a/OpenRA.Game/Traits/World/ScreenMap.cs b/OpenRA.Game/Traits/World/ScreenMap.cs
index 204e47c188..0cfd92905f 100644
--- a/OpenRA.Game/Traits/World/ScreenMap.cs
+++ b/OpenRA.Game/Traits/World/ScreenMap.cs
@@ -18,12 +18,10 @@ using OpenRA.Primitives;
 
 namespace OpenRA.Traits
 {
-	public readonly struct ActorBoundsPair
+	public readonly struct ActorBoundsPair(Actor actor, Polygon bounds)
 	{
-		public readonly Actor Actor;
-		public readonly Polygon Bounds;
-
-		public ActorBoundsPair(Actor actor, Polygon bounds) { Actor = actor; Bounds = bounds; }
+		public readonly Actor Actor = actor;
+		public readonly Polygon Bounds = bounds;
 
 		public override int GetHashCode() { return Actor.GetHashCode() ^ Bounds.GetHashCode(); }
 
diff --git a/OpenRA.Game/Widgets/Widget.cs b/OpenRA.Game/Widgets/Widget.cs
index c5ea984c5b..b88e4f6a04 100644
--- a/OpenRA.Game/Widgets/Widget.cs
+++ b/OpenRA.Game/Widgets/Widget.cs
@@ -182,22 +182,14 @@ namespace OpenRA.Widgets
 		protected virtual void Dispose(bool disposing) { }
 	}
 
-	public struct WidgetBounds
+	public struct WidgetBounds(int x, int y, int width, int height)
 	{
-		public int X, Y, Width, Height;
+		public int X = x, Y = y, Width = width, Height = height;
 		public readonly int Left => X;
 		public readonly int Right => X + Width;
 		public readonly int Top => Y;
 		public readonly int Bottom => Y + Height;
 
-		public WidgetBounds(int x, int y, int width, int height)
-		{
-			X = x;
-			Y = y;
-			Width = width;
-			Height = height;
-		}
-
 		public readonly Rectangle ToRectangle()
 		{
 			return new Rectangle(X, Y, Width, Height);
diff --git a/OpenRA.Game/World.cs b/OpenRA.Game/World.cs
index 421ede47e9..a159f5496b 100644
--- a/OpenRA.Game/World.cs
+++ b/OpenRA.Game/World.cs
@@ -635,12 +635,10 @@ namespace OpenRA
 		}
 	}
 
-	public readonly struct TraitPair<T> : IEquatable<TraitPair<T>>
+	public readonly struct TraitPair<T>(Actor actor, T trait) : IEquatable<TraitPair<T>>
 	{
-		public readonly Actor Actor;
-		public readonly T Trait;
-
-		public TraitPair(Actor actor, T trait) { Actor = actor; Trait = trait; }
+		public readonly Actor Actor = actor;
+		public readonly T Trait = trait;
 
 		public static bool operator ==(TraitPair<T> me, TraitPair<T> other) { return me.Actor == other.Actor && Equals(me.Trait, other.Trait); }
 		public static bool operator !=(TraitPair<T> me, TraitPair<T> other) { return !(me == other); }
diff --git a/OpenRA.Mods.Cnc/FileFormats/VxlReader.cs b/OpenRA.Mods.Cnc/FileFormats/VxlReader.cs
index f09608de7a..5a141c4ae5 100644
--- a/OpenRA.Mods.Cnc/FileFormats/VxlReader.cs
+++ b/OpenRA.Mods.Cnc/FileFormats/VxlReader.cs
@@ -16,16 +16,7 @@ using System.IO;
 namespace OpenRA.Mods.Cnc.FileFormats
 {
 	public enum NormalType : byte { TiberianSun = 2, RedAlert2 = 4 }
-	public readonly struct VxlElement
-	{
-		public readonly byte Color;
-		public readonly byte Normal;
-		public VxlElement(byte color, byte normal)
-		{
-			Color = color;
-			Normal = normal;
-		}
-	}
+	public readonly record struct VxlElement(byte Color, byte Normal);
 
 	public class VxlLimb
 	{
diff --git a/OpenRA.Mods.Cnc/Traits/Chronoshiftable.cs b/OpenRA.Mods.Cnc/Traits/Chronoshiftable.cs
index 7f92aaf3f6..d9c6063ad2 100644
--- a/OpenRA.Mods.Cnc/Traits/Chronoshiftable.cs
+++ b/OpenRA.Mods.Cnc/Traits/Chronoshiftable.cs
@@ -182,19 +182,11 @@ namespace OpenRA.Mods.Cnc.Traits
 		void ITransformActorInitModifier.ModifyTransformActorInit(Actor self, TypeDictionary init) { ModifyActorInit(init); }
 	}
 
-	public class ChronoshiftReturnInit : CompositeActorInit, ISingleInstanceInit
+	public class ChronoshiftReturnInit(int ticks, int duration, CPos origin, Actor chronosphere) : CompositeActorInit, ISingleInstanceInit
 	{
-		public readonly int Ticks;
-		public readonly int Duration;
-		public readonly CPos Origin;
-		public readonly ActorInitActorReference Chronosphere;
-
-		public ChronoshiftReturnInit(int ticks, int duration, CPos origin, Actor chronosphere)
-		{
-			Ticks = ticks;
-			Duration = duration;
-			Origin = origin;
-			Chronosphere = chronosphere;
-		}
+		public readonly int Ticks = ticks;
+		public readonly int Duration = duration;
+		public readonly CPos Origin = origin;
+		public readonly ActorInitActorReference Chronosphere = chronosphere;
 	}
 }
diff --git a/OpenRA.Mods.Common/ActorInitializer.cs b/OpenRA.Mods.Common/ActorInitializer.cs
index 3281903381..6f6c523353 100644
--- a/OpenRA.Mods.Common/ActorInitializer.cs
+++ b/OpenRA.Mods.Common/ActorInitializer.cs
@@ -17,38 +17,26 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common
 {
-	public class FacingInit : ValueActorInit<WAngle>, ISingleInstanceInit
+	public class FacingInit(WAngle value) : ValueActorInit<WAngle>(value), ISingleInstanceInit
 	{
-		public FacingInit(WAngle value)
-			: base(value) { }
 	}
 
-	public class TerrainOrientationInit : ValueActorInit<WRot>, ISingleInstanceInit, ISuppressInitExport
+	public class TerrainOrientationInit(WRot value) : ValueActorInit<WRot>(value), ISingleInstanceInit, ISuppressInitExport
 	{
-		public TerrainOrientationInit(WRot value)
-			: base(value) { }
 	}
 
-	public class CreationActivityDelayInit : ValueActorInit<int>, ISingleInstanceInit
+	public class CreationActivityDelayInit(int value) : ValueActorInit<int>(value), ISingleInstanceInit
 	{
-		public CreationActivityDelayInit(int value)
-			: base(value) { }
 	}
 
-	public class DynamicFacingInit : ValueActorInit<Func<WAngle>>, ISingleInstanceInit
+	public class DynamicFacingInit(Func<WAngle> value) : ValueActorInit<Func<WAngle>>(value), ISingleInstanceInit
 	{
-		public DynamicFacingInit(Func<WAngle> value)
-			: base(value) { }
 	}
 
 	// Cannot use ValueInit because map.yaml is expected to use the numeric value instead of enum name
-	public class SubCellInit : ActorInit, ISingleInstanceInit
+	public class SubCellInit(SubCell value) : ActorInit, ISingleInstanceInit
 	{
-		readonly int value;
-		public SubCellInit(SubCell value)
-		{
-			this.value = (int)value;
-		}
+		readonly int value = (int)value;
 
 		public virtual SubCell Value => (SubCell)value;
 
@@ -70,23 +58,17 @@ namespace OpenRA.Mods.Common
 		}
 	}
 
-	public class CenterPositionInit : ValueActorInit<WPos>, ISingleInstanceInit
+	public class CenterPositionInit(WPos value) : ValueActorInit<WPos>(value), ISingleInstanceInit
 	{
-		public CenterPositionInit(WPos value)
-			: base(value) { }
 	}
 
 	// Allows maps / transformations to specify the faction variant of an actor.
-	public class FactionInit : ValueActorInit<string>, ISingleInstanceInit
+	public class FactionInit(string value) : ValueActorInit<string>(value), ISingleInstanceInit
 	{
-		public FactionInit(string value)
-			: base(value) { }
 	}
 
-	public class EffectiveOwnerInit : ValueActorInit<Player>
+	public class EffectiveOwnerInit(Player value) : ValueActorInit<Player>(value)
 	{
-		public EffectiveOwnerInit(Player value)
-			: base(value) { }
 	}
 
 	sealed class ActorInitLoader : TypeConverter
diff --git a/OpenRA.Mods.Common/EditorBrushes/EditorBlit.cs b/OpenRA.Mods.Common/EditorBrushes/EditorBlit.cs
index 7472e22cd3..e31313eab6 100644
--- a/OpenRA.Mods.Common/EditorBrushes/EditorBlit.cs
+++ b/OpenRA.Mods.Common/EditorBrushes/EditorBlit.cs
@@ -16,35 +16,9 @@ using OpenRA.Mods.Common.Traits;
 
 namespace OpenRA.Mods.Common.EditorBrushes
 {
-	public readonly struct BlitTile
-	{
-		public readonly TerrainTile TerrainTile;
-		public readonly ResourceTile ResourceTile;
-		public readonly ResourceLayerContents? ResourceLayerContents;
-		public readonly byte Height;
+	public readonly record struct BlitTile(TerrainTile TerrainTile, ResourceTile ResourceTile, ResourceLayerContents? ResourceLayerContents, byte Height);
 
-		public BlitTile(TerrainTile terrainTile, ResourceTile resourceTile, ResourceLayerContents? resourceLayerContents, byte height)
-		{
-			TerrainTile = terrainTile;
-			ResourceTile = resourceTile;
-			ResourceLayerContents = resourceLayerContents;
-			Height = height;
-		}
-	}
-
-	public readonly struct EditorBlitSource
-	{
-		public readonly CellRegion CellRegion;
-		public readonly Dictionary<string, EditorActorPreview> Actors;
-		public readonly Dictionary<CPos, BlitTile> Tiles;
-
-		public EditorBlitSource(CellRegion cellRegion, Dictionary<string, EditorActorPreview> actors, Dictionary<CPos, BlitTile> tiles)
-		{
-			CellRegion = cellRegion;
-			Actors = actors;
-			Tiles = tiles;
-		}
-	}
+	public readonly record struct EditorBlitSource(CellRegion CellRegion, Dictionary<string, EditorActorPreview> Actors, Dictionary<CPos, BlitTile> Tiles);
 
 	[Flags]
 	public enum MapBlitFilters
diff --git a/OpenRA.Mods.Common/EditorBrushes/EditorResourceBrush.cs b/OpenRA.Mods.Common/EditorBrushes/EditorResourceBrush.cs
index 34d30800fc..4a5c4b4b01 100644
--- a/OpenRA.Mods.Common/EditorBrushes/EditorResourceBrush.cs
+++ b/OpenRA.Mods.Common/EditorBrushes/EditorResourceBrush.cs
@@ -109,19 +109,7 @@ namespace OpenRA.Mods.Common.Widgets
 		public void Dispose() { }
 	}
 
-	readonly struct CellResource
-	{
-		public readonly CPos Cell;
-		public readonly ResourceLayerContents OldResourceTile;
-		public readonly string NewResourceType;
-
-		public CellResource(CPos cell, ResourceLayerContents oldResourceTile, string newResourceType)
-		{
-			Cell = cell;
-			OldResourceTile = oldResourceTile;
-			NewResourceType = newResourceType;
-		}
-	}
+	readonly record struct CellResource(CPos Cell, ResourceLayerContents OldResourceTile, string NewResourceType);
 
 	sealed class AddResourcesEditorAction : IEditorAction
 	{
diff --git a/OpenRA.Mods.Common/EditorBrushes/EditorTileBrush.cs b/OpenRA.Mods.Common/EditorBrushes/EditorTileBrush.cs
index ae7ac039d6..42e20200cf 100644
--- a/OpenRA.Mods.Common/EditorBrushes/EditorTileBrush.cs
+++ b/OpenRA.Mods.Common/EditorBrushes/EditorTileBrush.cs
@@ -380,17 +380,5 @@ namespace OpenRA.Mods.Common.Widgets
 		}
 	}
 
-	sealed class UndoTile
-	{
-		public CPos Cell { get; }
-		public TerrainTile MapTile { get; }
-		public byte Height { get; }
-
-		public UndoTile(CPos cell, TerrainTile mapTile, byte height)
-		{
-			Cell = cell;
-			MapTile = mapTile;
-			Height = height;
-		}
-	}
+	sealed record UndoTile(CPos Cell, TerrainTile MapTile, byte Height);
 }
diff --git a/OpenRA.Mods.Common/FileFormats/InstallShieldCABCompression.cs b/OpenRA.Mods.Common/FileFormats/InstallShieldCABCompression.cs
index 732ff8f350..37464954a1 100644
--- a/OpenRA.Mods.Common/FileFormats/InstallShieldCABCompression.cs
+++ b/OpenRA.Mods.Common/FileFormats/InstallShieldCABCompression.cs
@@ -178,68 +178,36 @@ namespace OpenRA.Mods.Common.FileFormats
 			}
 		}
 
-		readonly struct CommonHeader
+		readonly struct CommonHeader(Stream stream)
 		{
 			public const long Size = 16;
-			public readonly uint Version;
-			public readonly uint VolumeInfo;
-			public readonly long CabDescriptorOffset;
-			public readonly uint CabDescriptorSize;
-
-			public CommonHeader(Stream stream)
-			{
-				Version = stream.ReadUInt32();
-				VolumeInfo = stream.ReadUInt32();
-				CabDescriptorOffset = stream.ReadUInt32();
-				CabDescriptorSize = stream.ReadUInt32();
-			}
+			public readonly uint Version = stream.ReadUInt32();
+			public readonly uint VolumeInfo = stream.ReadUInt32();
+			public readonly long CabDescriptorOffset = stream.ReadUInt32();
+			public readonly uint CabDescriptorSize = stream.ReadUInt32();
 		}
 
-		readonly struct VolumeHeader
+		readonly struct VolumeHeader(Stream stream)
 		{
-			public readonly uint DataOffset;
-			public readonly uint DataOffsetHigh;
-			public readonly uint FirstFileIndex;
-			public readonly uint LastFileIndex;
+			public readonly uint DataOffset = stream.ReadUInt32();
+			public readonly uint DataOffsetHigh = stream.ReadUInt32();
+			public readonly uint FirstFileIndex = stream.ReadUInt32();
+			public readonly uint LastFileIndex = stream.ReadUInt32();
 
-			public readonly uint FirstFileOffset;
-			public readonly uint FirstFileOffsetHigh;
-			public readonly uint FirstFileSizeExpanded;
-			public readonly uint FirstFileSizeExpandedHigh;
+			public readonly uint FirstFileOffset = stream.ReadUInt32();
+			public readonly uint FirstFileOffsetHigh = stream.ReadUInt32();
+			public readonly uint FirstFileSizeExpanded = stream.ReadUInt32();
+			public readonly uint FirstFileSizeExpandedHigh = stream.ReadUInt32();
 
-			public readonly uint FirstFileSizeCompressed;
-			public readonly uint FirstFileSizeCompressedHigh;
-			public readonly uint LastFileOffset;
-			public readonly uint LastFileOffsetHigh;
+			public readonly uint FirstFileSizeCompressed = stream.ReadUInt32();
+			public readonly uint FirstFileSizeCompressedHigh = stream.ReadUInt32();
+			public readonly uint LastFileOffset = stream.ReadUInt32();
+			public readonly uint LastFileOffsetHigh = stream.ReadUInt32();
 
-			public readonly uint LastFileSizeExpanded;
-			public readonly uint LastFileSizeExpandedHigh;
-			public readonly uint LastFileSizeCompressed;
-			public readonly uint LastFileSizeCompressedHigh;
-
-			public VolumeHeader(Stream stream)
-			{
-				DataOffset = stream.ReadUInt32();
-				DataOffsetHigh = stream.ReadUInt32();
-
-				FirstFileIndex = stream.ReadUInt32();
-				LastFileIndex = stream.ReadUInt32();
-				FirstFileOffset = stream.ReadUInt32();
-				FirstFileOffsetHigh = stream.ReadUInt32();
-
-				FirstFileSizeExpanded = stream.ReadUInt32();
-				FirstFileSizeExpandedHigh = stream.ReadUInt32();
-				FirstFileSizeCompressed = stream.ReadUInt32();
-				FirstFileSizeCompressedHigh = stream.ReadUInt32();
-
-				LastFileOffset = stream.ReadUInt32();
-				LastFileOffsetHigh = stream.ReadUInt32();
-				LastFileSizeExpanded = stream.ReadUInt32();
-				LastFileSizeExpandedHigh = stream.ReadUInt32();
-
-				LastFileSizeCompressed = stream.ReadUInt32();
-				LastFileSizeCompressedHigh = stream.ReadUInt32();
-			}
+			public readonly uint LastFileSizeExpanded = stream.ReadUInt32();
+			public readonly uint LastFileSizeExpandedHigh = stream.ReadUInt32();
+			public readonly uint LastFileSizeCompressed = stream.ReadUInt32();
+			public readonly uint LastFileSizeCompressedHigh = stream.ReadUInt32();
 		}
 
 		sealed class CabExtracter
diff --git a/OpenRA.Mods.Common/FileSystem/InstallShieldPackage.cs b/OpenRA.Mods.Common/FileSystem/InstallShieldPackage.cs
index e389bb0612..6d74b14b04 100644
--- a/OpenRA.Mods.Common/FileSystem/InstallShieldPackage.cs
+++ b/OpenRA.Mods.Common/FileSystem/InstallShieldPackage.cs
@@ -22,17 +22,7 @@ namespace OpenRA.Mods.Common.FileSystem
 	{
 		public sealed class InstallShieldPackage : IReadOnlyPackage
 		{
-			public readonly struct Entry
-			{
-				public readonly uint Offset;
-				public readonly uint Length;
-
-				public Entry(uint offset, uint length)
-				{
-					Offset = offset;
-					Length = length;
-				}
-			}
+			public readonly record struct Entry(uint Offset, uint Length);
 
 			public string Name { get; }
 			public IEnumerable<string> Contents => index.Keys;
diff --git a/OpenRA.Mods.Common/Graphics/DefaultSpriteSequence.cs b/OpenRA.Mods.Common/Graphics/DefaultSpriteSequence.cs
index e51126d719..b024964773 100644
--- a/OpenRA.Mods.Common/Graphics/DefaultSpriteSequence.cs
+++ b/OpenRA.Mods.Common/Graphics/DefaultSpriteSequence.cs
@@ -74,17 +74,7 @@ namespace OpenRA.Mods.Common.Graphics
 		}
 	}
 
-	public struct SpriteSequenceField<T>
-	{
-		public string Key;
-		public T DefaultValue;
-
-		public SpriteSequenceField(string key, T defaultValue)
-		{
-			Key = key;
-			DefaultValue = defaultValue;
-		}
-	}
+	public readonly record struct SpriteSequenceField<T>(string Key, T DefaultValue);
 
 	[Desc("Generic sprite sequence implementation, mostly unencumbered with game- or artwork-specific logic.")]
 	public class DefaultSpriteSequence : ISpriteSequence
diff --git a/OpenRA.Mods.Common/Lint/CheckChromeHotkeys.cs b/OpenRA.Mods.Common/Lint/CheckChromeHotkeys.cs
index e6b3785f88..1b76801634 100644
--- a/OpenRA.Mods.Common/Lint/CheckChromeHotkeys.cs
+++ b/OpenRA.Mods.Common/Lint/CheckChromeHotkeys.cs
@@ -18,13 +18,9 @@ using OpenRA.Widgets;
 namespace OpenRA.Mods.Common.Lint
 {
 	[AttributeUsage(AttributeTargets.Class)]
-	public sealed class ChromeLogicArgsHotkeys : Attribute
+	public sealed class ChromeLogicArgsHotkeys(params string[] logicArgKeys) : Attribute
 	{
-		public string[] LogicArgKeys;
-		public ChromeLogicArgsHotkeys(params string[] logicArgKeys)
-		{
-			LogicArgKeys = logicArgKeys;
-		}
+		public string[] LogicArgKeys = logicArgKeys;
 	}
 
 	[AttributeUsage(AttributeTargets.Method)]
diff --git a/OpenRA.Mods.Common/Orders/UnitOrderGenerator.cs b/OpenRA.Mods.Common/Orders/UnitOrderGenerator.cs
index 70847aa2d0..ee5e4a5bae 100644
--- a/OpenRA.Mods.Common/Orders/UnitOrderGenerator.cs
+++ b/OpenRA.Mods.Common/Orders/UnitOrderGenerator.cs
@@ -190,24 +190,15 @@ namespace OpenRA.Mods.Common.Orders
 			return order;
 		}
 
-		protected sealed class UnitOrderResult
+		protected sealed class UnitOrderResult(Actor actor, IOrderTargeter order, IIssueOrder trait, string cursor, in Target target)
 		{
-			public readonly Actor Actor;
-			public readonly IOrderTargeter Order;
-			public readonly IIssueOrder Trait;
-			public readonly string Cursor;
+			public readonly Actor Actor = actor;
+			public readonly IOrderTargeter Order = order;
+			public readonly IIssueOrder Trait = trait;
+			public readonly string Cursor = cursor;
 			public ref readonly Target Target => ref target;
 
-			readonly Target target;
-
-			public UnitOrderResult(Actor actor, IOrderTargeter order, IIssueOrder trait, string cursor, in Target target)
-			{
-				Actor = actor;
-				Order = order;
-				Trait = trait;
-				Cursor = cursor;
-				this.target = target;
-			}
+			readonly Target target = target;
 		}
 
 		public virtual bool ClearSelectionOnLeftClick => true;
diff --git a/OpenRA.Mods.Common/Scripting/ScriptEmmyTypeOverrideAttribute.cs b/OpenRA.Mods.Common/Scripting/ScriptEmmyTypeOverrideAttribute.cs
index 0d64d4517b..8358631c3c 100644
--- a/OpenRA.Mods.Common/Scripting/ScriptEmmyTypeOverrideAttribute.cs
+++ b/OpenRA.Mods.Common/Scripting/ScriptEmmyTypeOverrideAttribute.cs
@@ -18,15 +18,9 @@ namespace OpenRA.Mods.Common.Scripting
 	/// Used to override the Emmy Lua type generated by the <see cref="ExtractEmmyLuaAPI"/> utility command.
 	/// </summary>
 	[AttributeUsage(AttributeTargets.Parameter | AttributeTargets.ReturnValue)]
-	public sealed class ScriptEmmyTypeOverrideAttribute : Attribute
+	public sealed class ScriptEmmyTypeOverrideAttribute(string typeDeclaration, string genericTypeDeclaration = null) : Attribute
 	{
-		public readonly string TypeDeclaration;
-		public readonly string GenericTypeDeclaration;
-
-		public ScriptEmmyTypeOverrideAttribute(string typeDeclaration, string genericTypeDeclaration = null)
-		{
-			TypeDeclaration = typeDeclaration;
-			GenericTypeDeclaration = genericTypeDeclaration;
-		}
+		public readonly string TypeDeclaration = typeDeclaration;
+		public readonly string GenericTypeDeclaration = genericTypeDeclaration;
 	}
 }
diff --git a/OpenRA.Mods.Common/Terrain/DefaultTileCache.cs b/OpenRA.Mods.Common/Terrain/DefaultTileCache.cs
index 50df31ba36..6674f0ebba 100644
--- a/OpenRA.Mods.Common/Terrain/DefaultTileCache.cs
+++ b/OpenRA.Mods.Common/Terrain/DefaultTileCache.cs
@@ -19,19 +19,7 @@ using OpenRA.Support;
 
 namespace OpenRA.Mods.Common.Terrain
 {
-	public class TheaterTemplate
-	{
-		public readonly Sprite[] Sprites;
-		public readonly int Stride;
-		public readonly int Variants;
-
-		public TheaterTemplate(Sprite[] sprites, int stride, int variants)
-		{
-			Sprites = sprites;
-			Stride = stride;
-			Variants = variants;
-		}
-	}
+	public record TheaterTemplate(Sprite[] Sprites, int Stride, int Variants);
 
 	public sealed class DefaultTileCache : IDisposable
 	{
diff --git a/OpenRA.Mods.Common/Traits/Conditions/ExternalCondition.cs b/OpenRA.Mods.Common/Traits/Conditions/ExternalCondition.cs
index 087f677a88..d701fd6ca9 100644
--- a/OpenRA.Mods.Common/Traits/Conditions/ExternalCondition.cs
+++ b/OpenRA.Mods.Common/Traits/Conditions/ExternalCondition.cs
@@ -40,18 +40,11 @@ namespace OpenRA.Mods.Common.Traits
 
 	public class ExternalCondition : ITick, INotifyCreated, INotifyOwnerChanged
 	{
-		readonly struct TimedToken
+		readonly struct TimedToken(int token, Actor self, object source, int duration)
 		{
-			public readonly int Expires;
-			public readonly int Token;
-			public readonly object Source;
-
-			public TimedToken(int token, Actor self, object source, int duration)
-			{
-				Token = token;
-				Expires = self.World.WorldTick + duration;
-				Source = source;
-			}
+			public readonly int Expires = self.World.WorldTick + duration;
+			public readonly int Token = token;
+			public readonly object Source = source;
 		}
 
 		public readonly ExternalConditionInfo Info;
diff --git a/OpenRA.Mods.Common/Traits/Demolishable.cs b/OpenRA.Mods.Common/Traits/Demolishable.cs
index 067aa4148c..f58466e0c1 100644
--- a/OpenRA.Mods.Common/Traits/Demolishable.cs
+++ b/OpenRA.Mods.Common/Traits/Demolishable.cs
@@ -30,20 +30,12 @@ namespace OpenRA.Mods.Common.Traits
 
 	public class Demolishable : ConditionalTrait<DemolishableInfo>, IDemolishable, ITick, INotifyOwnerChanged
 	{
-		sealed class DemolishAction
+		sealed class DemolishAction(Actor saboteur, int delay, int token, BitSet<DamageType> damageTypes)
 		{
-			public readonly Actor Saboteur;
-			public readonly int Token;
-			public int Delay;
-			public readonly BitSet<DamageType> DamageTypes;
-
-			public DemolishAction(Actor saboteur, int delay, int token, BitSet<DamageType> damageTypes)
-			{
-				Saboteur = saboteur;
-				Delay = delay;
-				Token = token;
-				DamageTypes = damageTypes;
-			}
+			public readonly Actor Saboteur = saboteur;
+			public readonly int Token = token;
+			public int Delay = delay;
+			public readonly BitSet<DamageType> DamageTypes = damageTypes;
 		}
 
 		readonly List<DemolishAction> actions = [];
diff --git a/OpenRA.Mods.Common/Traits/LintAttributes.cs b/OpenRA.Mods.Common/Traits/LintAttributes.cs
index aee3d0dae4..7f2b72d063 100644
--- a/OpenRA.Mods.Common/Traits/LintAttributes.cs
+++ b/OpenRA.Mods.Common/Traits/LintAttributes.cs
@@ -23,15 +23,9 @@ namespace OpenRA.Mods.Common.Traits
 	public sealed class LocomotorReferenceAttribute : Attribute { }
 
 	[AttributeUsage(AttributeTargets.Field)]
-	public sealed class NotificationReferenceAttribute : Attribute
+	public sealed class NotificationReferenceAttribute(string type = null, string typeFromField = null) : Attribute
 	{
-		public readonly string NotificationTypeFieldName = null;
-		public readonly string NotificationType = null;
-
-		public NotificationReferenceAttribute(string type = null, string typeFromField = null)
-		{
-			NotificationType = type;
-			NotificationTypeFieldName = typeFromField;
-		}
+		public readonly string NotificationTypeFieldName = typeFromField;
+		public readonly string NotificationType = type;
 	}
 }
diff --git a/OpenRA.Mods.Common/Traits/Modifiers/FrozenUnderFog.cs b/OpenRA.Mods.Common/Traits/Modifiers/FrozenUnderFog.cs
index ccbc2254fa..5a676b54fd 100644
--- a/OpenRA.Mods.Common/Traits/Modifiers/FrozenUnderFog.cs
+++ b/OpenRA.Mods.Common/Traits/Modifiers/FrozenUnderFog.cs
@@ -40,14 +40,10 @@ namespace OpenRA.Mods.Common.Traits
 		bool isRendering;
 		bool created;
 
-		sealed class FrozenState
+		sealed class FrozenState(FrozenActor frozenActor)
 		{
-			public readonly FrozenActor FrozenActor;
+			public readonly FrozenActor FrozenActor = frozenActor;
 			public bool IsVisible;
-			public FrozenState(FrozenActor frozenActor)
-			{
-				FrozenActor = frozenActor;
-			}
 		}
 
 		public FrozenUnderFog(ActorInitializer init, FrozenUnderFogInfo info)
diff --git a/OpenRA.Mods.Common/Traits/SupportPowers/SelectDirectionalTarget.cs b/OpenRA.Mods.Common/Traits/SupportPowers/SelectDirectionalTarget.cs
index 2e23705f0c..e82400d4b1 100644
--- a/OpenRA.Mods.Common/Traits/SupportPowers/SelectDirectionalTarget.cs
+++ b/OpenRA.Mods.Common/Traits/SupportPowers/SelectDirectionalTarget.cs
@@ -170,18 +170,6 @@ namespace OpenRA.Mods.Common.Traits
 			return points;
 		}
 
-		sealed class Arrow
-		{
-			public Sprite Sprite { get; }
-			public double EndAngle { get; }
-			public WAngle Direction { get; }
-
-			public Arrow(Sprite sprite, double endAngle, WAngle direction)
-			{
-				Sprite = sprite;
-				EndAngle = endAngle;
-				Direction = direction;
-			}
-		}
+		sealed record Arrow(Sprite Sprite, double EndAngle, WAngle Direction);
 	}
 }
diff --git a/OpenRA.Mods.Common/Traits/World/Locomotor.cs b/OpenRA.Mods.Common/Traits/World/Locomotor.cs
index 987c4c080f..ab692a16a6 100644
--- a/OpenRA.Mods.Common/Traits/World/Locomotor.cs
+++ b/OpenRA.Mods.Common/Traits/World/Locomotor.cs
@@ -130,19 +130,7 @@ namespace OpenRA.Mods.Common.Traits
 
 	public class Locomotor : IWorldLoaded
 	{
-		readonly struct CellCache
-		{
-			public readonly LongBitSet<PlayerBitMask> Immovable;
-			public readonly LongBitSet<PlayerBitMask> Crushable;
-			public readonly CellFlag CellFlag;
-
-			public CellCache(LongBitSet<PlayerBitMask> immovable, CellFlag cellFlag, LongBitSet<PlayerBitMask> crushable)
-			{
-				Immovable = immovable;
-				Crushable = crushable;
-				CellFlag = cellFlag;
-			}
-		}
+		readonly record struct CellCache(LongBitSet<PlayerBitMask> Immovable, CellFlag CellFlag, LongBitSet<PlayerBitMask> Crushable);
 
 		public readonly LocomotorInfo Info;
 
diff --git a/OpenRA.Mods.Common/Traits/World/MarkerLayerOverlay.cs b/OpenRA.Mods.Common/Traits/World/MarkerLayerOverlay.cs
index e8b10b4a1a..88bb6fee66 100644
--- a/OpenRA.Mods.Common/Traits/World/MarkerLayerOverlay.cs
+++ b/OpenRA.Mods.Common/Traits/World/MarkerLayerOverlay.cs
@@ -378,17 +378,7 @@ namespace OpenRA.Mods.Common.Traits
 			disposed = true;
 		}
 
-		readonly struct MapLine
-		{
-			public readonly float2 Start;
-			public readonly float2 End;
-
-			public MapLine(float2 start, float2 end)
-			{
-				Start = start;
-				End = end;
-			}
-		}
+		readonly record struct MapLine(float2 Start, float2 End);
 
 		IEnumerable<IRenderable> IRenderAnnotations.RenderAnnotations(Actor self, WorldRenderer wr)
 		{
diff --git a/OpenRA.Mods.Common/Traits/World/ResourceLayer.cs b/OpenRA.Mods.Common/Traits/World/ResourceLayer.cs
index 9ebf3414a4..bdd03a0471 100644
--- a/OpenRA.Mods.Common/Traits/World/ResourceLayer.cs
+++ b/OpenRA.Mods.Common/Traits/World/ResourceLayer.cs
@@ -17,17 +17,11 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits
 {
-	public readonly struct ResourceLayerContents
+	public readonly struct ResourceLayerContents(string type, int density)
 	{
 		public static readonly ResourceLayerContents Empty = default;
-		public readonly string Type;
-		public readonly int Density;
-
-		public ResourceLayerContents(string type, int density)
-		{
-			Type = type;
-			Density = density;
-		}
+		public readonly string Type = type;
+		public readonly int Density = density;
 	}
 
 	[TraitLocation(SystemActors.World)]
diff --git a/OpenRA.Mods.Common/Traits/World/ShroudRenderer.cs b/OpenRA.Mods.Common/Traits/World/ShroudRenderer.cs
index d657466dfd..6d0cd33b75 100644
--- a/OpenRA.Mods.Common/Traits/World/ShroudRenderer.cs
+++ b/OpenRA.Mods.Common/Traits/World/ShroudRenderer.cs
@@ -94,16 +94,10 @@ namespace OpenRA.Mods.Common.Traits
 			BottomLeft
 		}
 
-		readonly struct TileInfo
+		readonly struct TileInfo(in float3 screenPosition, byte variant)
 		{
-			public readonly float3 ScreenPosition;
-			public readonly byte Variant;
-
-			public TileInfo(in float3 screenPosition, byte variant)
-			{
-				ScreenPosition = screenPosition;
-				Variant = variant;
-			}
+			public readonly float3 ScreenPosition = screenPosition;
+			public readonly byte Variant = variant;
 		}
 
 		readonly ShroudRendererInfo info;
diff --git a/OpenRA.Mods.Common/Traits/World/TerrainLighting.cs b/OpenRA.Mods.Common/Traits/World/TerrainLighting.cs
index ea63f7c835..ecdd6d83b5 100644
--- a/OpenRA.Mods.Common/Traits/World/TerrainLighting.cs
+++ b/OpenRA.Mods.Common/Traits/World/TerrainLighting.cs
@@ -35,22 +35,13 @@ namespace OpenRA.Mods.Common.Traits
 
 	public sealed class TerrainLighting : ITerrainLighting
 	{
-		sealed class LightSource
+		sealed class LightSource(WPos pos, CPos cell, WDist range, float intensity, in float3 tint)
 		{
-			public readonly WPos Pos;
-			public readonly CPos Cell;
-			public readonly WDist Range;
-			public readonly float Intensity;
-			public readonly float3 Tint;
-
-			public LightSource(WPos pos, CPos cell, WDist range, float intensity, in float3 tint)
-			{
-				Pos = pos;
-				Cell = cell;
-				Range = range;
-				Intensity = intensity;
-				Tint = tint;
-			}
+			public readonly WPos Pos = pos;
+			public readonly CPos Cell = cell;
+			public readonly WDist Range = range;
+			public readonly float Intensity = intensity;
+			public readonly float3 Tint = tint;
 		}
 
 		readonly TerrainLightingInfo info;
diff --git a/OpenRA.Mods.Common/Traits/World/WarheadDebugOverlay.cs b/OpenRA.Mods.Common/Traits/World/WarheadDebugOverlay.cs
index a138e7c689..bf92016417 100644
--- a/OpenRA.Mods.Common/Traits/World/WarheadDebugOverlay.cs
+++ b/OpenRA.Mods.Common/Traits/World/WarheadDebugOverlay.cs
@@ -28,22 +28,14 @@ namespace OpenRA.Mods.Common.Traits
 
 	public class WarheadDebugOverlay : IRenderAnnotations
 	{
-		sealed class WHImpact
+		sealed class WHImpact(WPos pos, WDist[] range, int time, Color color)
 		{
-			public readonly WPos CenterPosition;
-			public readonly WDist[] Range;
-			public readonly Color Color;
-			public int Time;
+			public readonly WPos CenterPosition = pos;
+			public readonly WDist[] Range = range;
+			public readonly Color Color = color;
+			public int Time = time;
 
 			public WDist OuterRange => Range[^1];
-
-			public WHImpact(WPos pos, WDist[] range, int time, Color color)
-			{
-				CenterPosition = pos;
-				Range = range;
-				Color = color;
-				Time = time;
-			}
 		}
 
 		readonly WarheadDebugOverlayInfo info;
diff --git a/OpenRA.Mods.Common/UtilityCommands/ExtractChromeStrings.cs b/OpenRA.Mods.Common/UtilityCommands/ExtractChromeStrings.cs
index 3f189b6434..9069097d46 100644
--- a/OpenRA.Mods.Common/UtilityCommands/ExtractChromeStrings.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/ExtractChromeStrings.cs
@@ -200,22 +200,13 @@ namespace OpenRA.Mods.Common.UtilityCommands
 			}
 		}
 
-		struct ExtractionCandidate
+		struct ExtractionCandidate(string key, string type, string value, MiniYamlNodeBuilder node)
 		{
-			public string Chrome;
-			public readonly string Key;
-			public readonly string Type;
-			public readonly string Value;
-			public readonly List<MiniYamlNodeBuilder> Nodes;
-
-			public ExtractionCandidate(string key, string type, string value, MiniYamlNodeBuilder node)
-			{
-				Chrome = null;
-				Key = key;
-				Type = type;
-				Value = value;
-				Nodes = [node];
-			}
+			public string Chrome = null;
+			public readonly string Key = key;
+			public readonly string Type = type;
+			public readonly string Value = value;
+			public readonly List<MiniYamlNodeBuilder> Nodes = [node];
 		}
 
 		static string ClearContainersAndToLower(string node)
diff --git a/OpenRA.Mods.Common/UtilityCommands/ExtractYamlStrings.cs b/OpenRA.Mods.Common/UtilityCommands/ExtractYamlStrings.cs
index f62313f170..275f554743 100644
--- a/OpenRA.Mods.Common/UtilityCommands/ExtractYamlStrings.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/ExtractYamlStrings.cs
@@ -229,22 +229,13 @@ namespace OpenRA.Mods.Common.UtilityCommands
 			}
 		}
 
-		struct ExtractionCandidate
+		struct ExtractionCandidate(string actor, string key, string value, MiniYamlNodeBuilder node)
 		{
-			public string Filename;
-			public readonly string Actor;
-			public readonly string Key;
-			public readonly string Value;
-			public readonly List<MiniYamlNodeBuilder> Nodes;
-
-			public ExtractionCandidate(string actor, string key, string value, MiniYamlNodeBuilder node)
-			{
-				Filename = null;
-				Actor = actor;
-				Key = key;
-				Value = value;
-				Nodes = [node];
-			}
+			public string Filename = null;
+			public readonly string Actor = actor;
+			public readonly string Key = key;
+			public readonly string Value = value;
+			public readonly List<MiniYamlNodeBuilder> Nodes = [node];
 		}
 
 		static string ToLowerActor(string actor)
diff --git a/OpenRA.Mods.Common/Widgets/LineGraphWidget.cs b/OpenRA.Mods.Common/Widgets/LineGraphWidget.cs
index b1249fa648..acd0a5f49d 100644
--- a/OpenRA.Mods.Common/Widgets/LineGraphWidget.cs
+++ b/OpenRA.Mods.Common/Widgets/LineGraphWidget.cs
@@ -230,17 +230,5 @@ namespace OpenRA.Mods.Common.Widgets
 		}
 	}
 
-	public class LineGraphSeries
-	{
-		public string Key;
-		public Color Color;
-		public IEnumerable<float> Points;
-
-		public LineGraphSeries(string key, Color color, IEnumerable<float> points)
-		{
-			Key = key;
-			Color = color;
-			Points = points;
-		}
-	}
+	public record LineGraphSeries(string Key, Color Color, IEnumerable<float> Points);
 }
diff --git a/OpenRA.Mods.Common/Widgets/Logic/Editor/ActorSelectorLogic.cs b/OpenRA.Mods.Common/Widgets/Logic/Editor/ActorSelectorLogic.cs
index 1ab8480232..7ba382c53b 100644
--- a/OpenRA.Mods.Common/Widgets/Logic/Editor/ActorSelectorLogic.cs
+++ b/OpenRA.Mods.Common/Widgets/Logic/Editor/ActorSelectorLogic.cs
@@ -24,21 +24,7 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 		[FluentReference("actorType")]
 		const string ActorTypeTooltip = "label-actor-type";
 
-		sealed class ActorSelectorActor
-		{
-			public readonly ActorInfo Actor;
-			public readonly string[] Categories;
-			public readonly string[] SearchTerms;
-			public readonly string Tooltip;
-
-			public ActorSelectorActor(ActorInfo actor, string[] categories, string[] searchTerms, string tooltip)
-			{
-				Actor = actor;
-				Categories = categories;
-				SearchTerms = searchTerms;
-				Tooltip = tooltip;
-			}
-		}
+		sealed record ActorSelectorActor(ActorInfo Actor, string[] Categories, string[] SearchTerms, string Tooltip);
 
 		readonly DropDownButtonWidget ownersDropDown;
 		readonly Ruleset mapRules;
diff --git a/OpenRA.Mods.Common/Widgets/Logic/Editor/SaveMapLogic.cs b/OpenRA.Mods.Common/Widgets/Logic/Editor/SaveMapLogic.cs
index 7d5593ba6c..6e86a279a1 100644
--- a/OpenRA.Mods.Common/Widgets/Logic/Editor/SaveMapLogic.cs
+++ b/OpenRA.Mods.Common/Widgets/Logic/Editor/SaveMapLogic.cs
@@ -30,19 +30,7 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 			public string UiLabel;
 		}
 
-		sealed class SaveDirectory
-		{
-			public readonly Folder Folder;
-			public readonly string DisplayName;
-			public readonly MapClassification Classification;
-
-			public SaveDirectory(Folder folder, string displayName, MapClassification classification)
-			{
-				Folder = folder;
-				DisplayName = displayName;
-				Classification = classification;
-			}
-		}
+		sealed record SaveDirectory(Folder Folder, string DisplayName, MapClassification Classification);
 
 		[FluentReference]
 		const string SaveMapFailedTitle = "dialog-save-map-failed.title";
diff --git a/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyUtils.cs b/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyUtils.cs
index 9d894b1785..cd4e2813eb 100644
--- a/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyUtils.cs
+++ b/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyUtils.cs
@@ -42,19 +42,7 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 		[FluentReference]
 		const string Slot = "options-lobby-slot.slot";
 
-		sealed class SlotDropDownOption
-		{
-			public readonly string Title;
-			public readonly string Order;
-			public readonly Func<bool> Selected;
-
-			public SlotDropDownOption(string title, string order, Func<bool> selected)
-			{
-				Title = title;
-				Order = order;
-				Selected = selected;
-			}
-		}
+		sealed record SlotDropDownOption(string Title, string Order, Func<bool> Selected);
 
 		public static void ShowSlotDropDown(DropDownButtonWidget dropdown, Session.Slot slot,
 			Session.Client client, OrderManager orderManager, MapPreview map, ModData modData)
@@ -716,17 +704,4 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 				widget.IsVisible = () => false;
 		}
 	}
-
-	sealed class ShowPlayerActionDropDownOption
-	{
-		public Action Click { get; set; }
-		public string Title;
-		public Func<bool> Selected = () => false;
-
-		public ShowPlayerActionDropDownOption(string title, Action click)
-		{
-			Click = click;
-			Title = title;
-		}
-	}
 }
diff --git a/OpenRA.Mods.D2k/PackageLoaders/D2kSoundResources.cs b/OpenRA.Mods.D2k/PackageLoaders/D2kSoundResources.cs
index fdd3e86e6b..03015a94eb 100644
--- a/OpenRA.Mods.D2k/PackageLoaders/D2kSoundResources.cs
+++ b/OpenRA.Mods.D2k/PackageLoaders/D2kSoundResources.cs
@@ -21,17 +21,7 @@ namespace OpenRA.Mods.D2k.PackageLoaders
 	{
 		sealed class D2kSoundResources : IReadOnlyPackage
 		{
-			readonly struct Entry
-			{
-				public readonly uint Offset;
-				public readonly uint Length;
-
-				public Entry(uint offset, uint length)
-				{
-					Offset = offset;
-					Length = length;
-				}
-			}
+			readonly record struct Entry(uint Offset, uint Length);
 
 			public string Name { get; }
 			public IEnumerable<string> Contents => index.Keys;