Use expression body syntax

OpenRA.Game/Primitives/ReadOnlyList.cs

@@ -72,9 +72,10 @@ namespace OpenRA
 		#endregion
 
 		#region IReadOnlyList implementation
-		public int Count { get { return list.Count; } }
+		public int Count => list.Count;
+
+		public T this[int index] => list[index];
 
-		public T this[int index] { get { return list[index]; } }
 		#endregion
 	}
 }