Generic Event In Interface

[C# Programming]

I have a generic event handler:

public delegate void EventHandler(object sender, TEventArgs e);
public class EventArgs_Generic : EventArgs
{
private T _TargetObject;
public T TargetObject
{
get { return _TargetObject; }
}

public EventArgs_Generic(T Target)
{
_TargetObject = Target;
}
}
How do I list this in an interface? Something like...

event EventHandler ....
Thanks
Everything makes sense in someone's mind