If changed settings require a restart, offer the user to do it now.

Add a dialog when closing the settings screen asking the user if they would like to restart the game now in order to apply any settings that are only applied after restarting the game. The game is reloaded in-process by spinning up a new AppDomain in order to reset state.

OpenRA.Game/Support/Program.cs

@@ -1,6 +1,6 @@
 #region Copyright & License Information
 /*
- * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
  * This file is part of OpenRA, which is free software. It is made
  * available to you under the terms of the GNU General Public License
  * as published by the Free Software Foundation. For more information,
@@ -11,30 +11,37 @@
 using System;
 using System.Diagnostics;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 
 namespace OpenRA
 {
+	enum RunStatus
+	{
+		Error = -1,
+		Success = 0,
+		Restart = 1,
+		Running = int.MaxValue
+	}
+
 	static class Program
 	{
 		[STAThread]
-		static void Main(string[] args)
+		static int Main(string[] args)
 		{
 			if (Debugger.IsAttached || args.Contains("--just-die"))
-			{
-				Run(args);
-				return;
-			}
+				return (int)Run(args);
 
 			AppDomain.CurrentDomain.UnhandledException += (_, e) => FatalError((Exception)e.ExceptionObject);
 
 			try
 			{
-				Run(args);
+				return (int)Run(args);
 			}
 			catch (Exception e)
 			{
 				FatalError(e);
+				return (int)RunStatus.Error;
 			}
 		}
 
@@ -102,11 +109,25 @@ namespace OpenRA
 			return sb;
 		}
 
-		static void Run(string[] args)
+		static RunStatus Run(string[] args)
 		{
+			if (AppDomain.CurrentDomain.IsDefaultAppDomain())
+			{
+				var name = Assembly.GetEntryAssembly().GetName();
+				int retCode;
+				do
+				{
+					var domain = AppDomain.CreateDomain("Game");
+					retCode = domain.ExecuteAssemblyByName(name, args);
+					AppDomain.Unload(domain);
+				}
+				while (retCode == (int)RunStatus.Restart);
+				return RunStatus.Success;
+			}
+
 			Game.Initialize(new Arguments(args));
 			GC.Collect();
-			Game.Run();
+			return Game.Run();
 		}
 	}
 }