Compiler Error CS0066

'event': event must be of a delegate type

The event keyword requires a delegate type. For more information, see Events and Delegates.

The following sample generates CS0066:

// CS0066.cs  
using System;  
  
public class EventHandler  
{  
}  
  
// to fix the error, remove the event declaration and the  
// EventHandler class declaration, and uncomment the following line  
// public delegate void EventHandler();  
  
public class a  
{  
   public event EventHandler Click;   // CS0066  
  
   private void TestMethod()  
   {  
      if (Click != null)  
         Click();  
   }  
  
   public static void Main()  
   {  
   }  
}