I'm trying to add plugins to my game and what I'm trying to implement is this:

• Plugins will be either mine or 3rd party's so I would like a solution where crashing of the plugin would not mean crashing of the main application.

• Methods of plugins are called very often (for example because of drawing of game objects).

What I've found so far:

• 1) http://www.codeproject.com/KB/cs/pluginsincsharp.aspx - simple concept that seems like it should work nicely. Since plugins are used in my game for every round I would suffice to add the Restart() method and if a plugin is no longer needed Unload() method + GC should take care of that.

• 2) http://mef.codeplex.com/Wikipage - Managed Extensibility Framework - my program should work on .NET 3.5 and I don't want to add any other framework separately I want to write my plugin system myself. Therefore this solution is out of question.

• 3) Microsoft provides: http://msdn.microsoft.com/en-us/library/system.addin.aspx but according to a few articles I've read it is very complex.

• 4) Different AppDomains for plugins. According to Marc Gravell ( http://stackoverflow.com/questions/665668/usage-of-appdomain-in-c ) different AppDomains allow isolation. Unloading of plugins would be easy. What would the performance load be? I need to call methods of plugins very often (to draw objects for example).

  • Using Application Domains - http://msdn.microsoft.com/en-us/library/yb506139.aspx

  • A few tutorials on java2s.com

Could you please comment on my findings? New approaches are also welcomed! Thanks!