Compiler Error CS0069
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Compiler Error CS0069 

Error Message

An event in an interface cannot have add or remove accessors

You cannot define an event's accessor functions in an interface. For more information, see Events (C# Programming Guide) and Interfaces (C# Programming Guide).

The following sample generates CS0069:

// CS0069.cs
// compile with: /target:library

public delegate void EventHandler();

public interface a
   event EventHandler Click { remove {} }   // CS0069
   event EventHandler Click2;   // OK
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