Use pattern matching

OpenRA.Game/Graphics/ModelRenderer.cs

@@ -223,8 +223,7 @@ namespace OpenRA.Graphics
 								ShadowAmbient, ShadowDiffuse, shadowPalette.TextureMidIndex, normals.TextureMidIndex);
 					}
 				}
-			}
-			));
+			}));
 
 			var screenLightVector = Util.MatrixVectorMultiply(invShadowTransform, ZVector);
 			screenLightVector = Util.MatrixVectorMultiply(cameraTransform, screenLightVector);

OpenRA.Game/Graphics/WorldRenderer.cs

@@ -177,8 +177,7 @@ namespace OpenRA.Graphics
 
 			foreach (var e in World.Effects)
 			{
-				var ea = e as IEffectAboveShroud;
-				if (ea == null)
+				if (!(e is IEffectAboveShroud ea))
 					continue;
 
 				foreach (var renderable in ea.RenderAboveShroud(this))
@@ -219,8 +218,7 @@ namespace OpenRA.Graphics
 
 			foreach (var e in World.Effects)
 			{
-				var ea = e as IEffectAnnotation;
-				if (ea == null)
+				if (!(e is IEffectAnnotation ea))
 					continue;
 
 				foreach (var renderAnnotation in ea.RenderAnnotation(this))

OpenRA.Game/Map/ActorReference.cs

@@ -87,8 +87,7 @@ namespace OpenRA
 			var ret = new MiniYaml(Type);
 			foreach (var o in initDict.Value)
 			{
-				var init = o as ActorInit;
-				if (init == null || o is ISuppressInitExport)
+				if (!(o is ActorInit init) || o is ISuppressInitExport)
 					continue;
 
 				if (initFilter != null && !initFilter(init))

OpenRA.Game/Primitives/BitSet.cs

@@ -98,7 +98,7 @@ namespace OpenRA.Primitives
 		public static bool operator !=(BitSet<T> me, BitSet<T> other) { return !(me == other); }
 
 		public bool Equals(BitSet<T> other) { return other == this; }
-		public override bool Equals(object obj) { return obj is BitSet<T> && Equals((BitSet<T>)obj); }
+		public override bool Equals(object obj) { return obj is BitSet<T> bitSet && Equals(bitSet); }
 		public override int GetHashCode() { return bits.GetHashCode(); }
 
 		public bool IsEmpty => bits == 0;

OpenRA.Game/Scripting/ScriptMemberWrapper.cs

@@ -86,8 +86,7 @@ namespace OpenRA.Scripting
 				{
 					foreach (var arg in clrArgs)
 					{
-						var table = arg as LuaValue[];
-						if (table == null)
+						if (!(arg is LuaValue[] table))
 							continue;
 
 						foreach (var value in table)