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  1. using System;
  2.  
  3. public class Events
  4. {
  5. 	public delegate void MyAction();
  6.  
  7.     public event MyAction OriginalEvent = delegate { };
  8.     public event Action DelegatingEvent
  9.     {
  10.         add { OriginalEvent += new MyAction(value); }
  11.         remove { OriginalEvent -= new MyAction(value); }
  12.     }
  13.  
  14.     public void FireOriginalEvent()
  15.     {
  16.         OriginalEvent();
  17.     }
  18. }
  19.  
  20. public class Test
  21. {
  22.     private static void PrintFoo()
  23.     {
  24.         Console.WriteLine("Foo");
  25.     }
  26.  
  27. 	public static void Main()
  28. 	{
  29. 		Console.WriteLine("Testing original event:");
  30. 		Events events1 = new Events();
  31.  
  32. 		events1.OriginalEvent += PrintFoo;
  33. 		events1.OriginalEvent -= PrintFoo;
  34. 		events1.FireOriginalEvent();
  35.  
  36. 		Console.WriteLine("Testing delegating event:");
  37. 		Events events2 = new Events();
  38.  
  39. 		events2.DelegatingEvent += PrintFoo;
  40. 		events2.DelegatingEvent -= PrintFoo; // Doesn't actually remove anything!
  41. 		events2.FireOriginalEvent();
  42.  
  43. 		Console.WriteLine("However, THIS works:");
  44. 		Events events3 = new Events();
  45.  
  46. 		Action printFooAction = PrintFoo;
  47. 		events3.DelegatingEvent += printFooAction;
  48. 		events3.DelegatingEvent -= printFooAction;
  49. 		events3.FireOriginalEvent();
  50. 	}
  51. }
Success #stdin #stdout 0.02s 33880KB
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Standard input is empty
stdout
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Testing original event:
Testing delegating event:
Foo
However, THIS works:
https://ideone.com/eArKxq
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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