Unsubscribe anonymous method in C#

Question

Is it possible to unsubscribe an anonymous method from an event?

If I subscribe to an event like this:

void MyMethod()
{
    Console.WriteLine(\"I di         


        

Answer 1

Instead of keeping a reference to any delegate you can instrument your class in order to give the event's invocation list back to the caller. Basically you can write something like this (assuming that MyEvent is declared inside MyClass):

public class MyClass 
{
  public event EventHandler MyEvent;

  public IEnumerable GetMyEventHandlers()  
  {  
      return from d in MyEvent.GetInvocationList()  
             select (EventHandler)d;  
  }  
}

So you can access the whole invocation list from outside MyClass and unsubscribe any handler you want. For instance:

myClass.MyEvent -= myClass.GetMyEventHandlers().Last();

I've written a full post about this tecnique here.