diff --git a/.editorconfig b/.editorconfig
index f4dbfb1d55..4e7022ac73 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1061,6 +1061,9 @@ dotnet_diagnostic.RCS1159.severity = warning
 # Unused type parameter.
 dotnet_diagnostic.RCS1164.severity = warning
 
+# Use read-only auto-implemented property.
+dotnet_diagnostic.RCS1170.severity = warning
+
 # Use 'is' operator instead of 'as' operator.
 dotnet_diagnostic.RCS1172.severity = warning
 
diff --git a/OpenRA.Game/Actor.cs b/OpenRA.Game/Actor.cs
index 0b55fc30a9..8133bde68d 100644
--- a/OpenRA.Game/Actor.cs
+++ b/OpenRA.Game/Actor.cs
@@ -71,7 +71,7 @@ namespace OpenRA
 		public IEffectiveOwner EffectiveOwner { get; }
 		public IOccupySpace OccupiesSpace { get; }
 		public ITargetable[] Targetables { get; }
-		public IEnumerable<ITargetablePositions> EnabledTargetablePositions { get; private set; }
+		public IEnumerable<ITargetablePositions> EnabledTargetablePositions { get; }
 
 		public bool IsIdle => CurrentActivity == null;
 		public bool IsDead => Disposed || (health != null && health.IsDead);
diff --git a/OpenRA.Mods.Common/Widgets/RadarWidget.cs b/OpenRA.Mods.Common/Widgets/RadarWidget.cs
index 9ab1306d5d..e459b14c2e 100644
--- a/OpenRA.Mods.Common/Widgets/RadarWidget.cs
+++ b/OpenRA.Mods.Common/Widgets/RadarWidget.cs
@@ -29,6 +29,8 @@ namespace OpenRA.Mods.Common.Widgets
 		public int AnimationLength = 5;
 		public string RadarOnlineSound = null;
 		public string RadarOfflineSound = null;
+		public string SoundUp;
+		public string SoundDown;
 		public Func<bool> IsEnabled = () => true;
 		public Action AfterOpen = () => { };
 		public Action AfterClose = () => { };
@@ -63,9 +65,6 @@ namespace OpenRA.Mods.Common.Widgets
 		PlayerRadarTerrain playerRadarTerrain;
 		Player currentPlayer;
 
-		public string SoundUp { get; private set; }
-		public string SoundDown { get; private set; }
-
 		[ObjectCreator.UseCtor]
 		public RadarWidget(World world, WorldRenderer worldRenderer)
 		{
diff --git a/OpenRA.Mods.Common/Widgets/ResourcePreviewWidget.cs b/OpenRA.Mods.Common/Widgets/ResourcePreviewWidget.cs
index e02d369e01..5a36e78c06 100644
--- a/OpenRA.Mods.Common/Widgets/ResourcePreviewWidget.cs
+++ b/OpenRA.Mods.Common/Widgets/ResourcePreviewWidget.cs
@@ -44,7 +44,7 @@ namespace OpenRA.Mods.Common.Widgets
 			}
 		}
 
-		public Size IdealPreviewSize { get; private set; }
+		public Size IdealPreviewSize { get; }
 
 		[ObjectCreator.UseCtor]
 		public ResourcePreviewWidget(ModData modData, WorldRenderer worldRenderer, World world)