public delegate void Action<TInput1, TInput2, TInput3, TInput4>(
	TInput1 o1,
	TInput2 o2,
	TInput3 o3,
	TInput4 o4
)

Public Delegate Sub Action(Of TInput1, TInput2, TInput3, TInput4) ( _
	o1 As TInput1, _
	o2 As TInput2, _
	o3 As TInput3, _
	o4 As TInput4 _
)

generic<typename TInput1, typename TInput2, typename TInput3, typename TInput4>
public delegate void Action(
	TInput1 o1, 
	TInput2 o2, 
	TInput3 o3, 
	TInput4 o4
)