Fix RCS1257, RCS1258, RCS1261, RCS1262, RCS1265, RCS1266, RCS1267

OpenRA.Game/FileSystem/Folder.cs

@@ -35,7 +35,7 @@ namespace OpenRA.FileSystem
 				return Directory.GetFiles(Name, "*", SearchOption.TopDirectoryOnly)
 					.Concat(Directory.GetDirectories(Name))
 					.Select(Path.GetFileName)
-					.OrderBy(f => f);
+					.Order();
 			}
 		}
 

OpenRA.Game/Game.cs

@@ -408,7 +408,7 @@ namespace OpenRA
 
 				// Sanitize input from platform-specific launchers
 				// Process.Start requires paths to not be quoted, even if they contain spaces
-				if (launchPath != null && launchPath[0] == '"' && launchPath.Last() == '"')
+				if (launchPath != null && launchPath[0] == '"' && launchPath[^1] == '"')
 					launchPath = launchPath[1..^1];
 
 				// Metadata registration requires an explicit launch path
@@ -584,7 +584,7 @@ namespace OpenRA
 				Directory.CreateDirectory(directory);
 
 				var filename = TimestampedFilename(true);
-				var path = Path.Combine(directory, string.Concat(filename, ".png"));
+				var path = Path.Combine(directory, $"{filename}.png");
 				Log.Write("debug", "Taking screenshot " + path);
 
 				Renderer.SaveScreenshot(path);

OpenRA.Game/HttpExtension.cs

@@ -26,7 +26,7 @@ namespace OpenRA
 			var total = response.Content.Headers.ContentLength ?? -1;
 			var canReportProgress = total > 0;
 
-			using (var contentStream = await response.Content.ReadAsStreamAsync(token))
+			await using (var contentStream = await response.Content.ReadAsStreamAsync(token))
 			{
 				var totalRead = 0L;
 				var buffer = new byte[8192];