public class WeakEventHandler<T, E> : IWeakEventHandler<E>
where T : class
where E : EventArgs

Public Class WeakEventHandler(Of T As Class, E As EventArgs)
	Implements IWeakEventHandler(Of E)

generic<typename T, typename E>
where T : ref class
where E : EventArgs
public ref class WeakEventHandler : IWeakEventHandler<E>

type WeakEventHandler<'T, 'E when 'T : not struct when 'E : EventArgs> =  
    class
        interface IWeakEventHandler<'E>
    end