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Compiler Error CS0407 

Error Message

'return-type method' has the wrong return type

The method was not compatible with the delegate type. The argument types matched, but the return type was not the correct return type for that delegate. To avoid this error, use a different method, change the method's return type, or change the delegate's return type.

Example

The following sample generates CS0407:

// CS0407.cs
public delegate int MyDelegate();

class C
{
    MyDelegate d;

    public C()
    {
        d = new MyDelegate(F);  // OK: F returns int
        d = new MyDelegate(G);  // CS0407 – G doesn't return int
    }

    public int F()
    {
        return 1;
    }

    public void G()
    {
    }

    public static void Main()
    {
        C c1 = new C();
    }
}
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