abstract events

Hi Experts,

When I try to compile the attached code, I get the following errors:

<'CMyClass' does not implement inherited abstract member 'CMyBaseClass.ErrorEvent.add'>

Also, when I go to add the "ErrorEvent" event in CMyClass, the event doesn't come up on the list of available events.

Any ideas?

abstract class CMyBaseClass
{
    protected delegate void ErrorEventDelegate(string error);
    protected abstract event ErrorEventDelegate ErrorEvent;
}

class CMyClass : CMyBaseClass
{
    public CMyClass()
    {
        base.ErrorEvent += new ErrorEventDelegate(CMyClass_ErrorEvent);
     }

    void CMyClass_ErrorEvent(string error)
    {
        throw new Exception("The method or operation is not implemented.");
    }
}

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