public delegate void DataEventHandler<T>(
	Object sender,
	DataEventArgs<T> e
)

Public Delegate Sub DataEventHandler(Of T) ( _
	sender As Object, _
	e As DataEventArgs(Of T) _
)

generic<typename T>
public delegate void DataEventHandler(
	Object^ sender, 
	DataEventArgs<T> e
)

J# supports the use of generic APIs, but not the declaration of new ones.