Fix RCS1227

.editorconfig

@@ -1109,6 +1109,9 @@ dotnet_diagnostic.RCS1225.severity = warning
 # Add paragraph to documentation comment.
 dotnet_diagnostic.RCS1226.severity = warning
 
+# Validate arguments correctly.
+dotnet_diagnostic.RCS1227.severity = warning
+
 # Unnecessary explicit use of enumerator.
 dotnet_diagnostic.RCS1230.severity = warning
 

OpenRA.Game/Map/Map.cs

@@ -1353,6 +1353,10 @@ namespace OpenRA
 				throw new ArgumentOutOfRangeException(nameof(maxRange),
 					$"The requested range ({maxRange}) cannot exceed the value of MaximumTileSearchRange ({Grid.MaximumTileSearchRange})");
 
+			return FindTilesInAnnulus();
+
+			IEnumerable<CPos> FindTilesInAnnulus()
+			{
 				for (var i = minRange; i <= maxRange; i++)
 				{
 					foreach (var offset in Grid.TilesByDistance[i])
@@ -1363,6 +1367,7 @@ namespace OpenRA
 					}
 				}
 			}
+		}
 
 		public IEnumerable<CPos> FindTilesInCircle(CPos center, int maxRange, bool allowOutsideBounds = false)
 		{