Framework V 4 !exclusive! Access

public interface IPlugin { void Execute(); } [Export(typeof(IPlugin))] public class MyPlugin : IPlugin { public void Execute() => Console.WriteLine("Hello from plugin"); } If you meant a (like Entity Framework 4, Spring Framework 4, etc.), please clarify and I’ll produce the correct feature.

Here’s one major feature: Built into .NET Framework 4 (in System.ComponentModel.Composition ). framework v 4

Since you said — I assume you want a notable technical feature introduced in .NET Framework 4 (released 2010). public interface IPlugin { void Execute()