public delegate TOutput Func<TInput1, TInput2, TInput3, TOutput>(
	TInput1 o1,
	TInput2 o2,
	TInput3 o3
)

Public Delegate Function Func(Of TInput1, TInput2, TInput3, TOutput) ( _
	o1 As TInput1, _
	o2 As TInput2, _
	o3 As TInput3 _
) As TOutput

generic<typename TInput1, typename TInput2, typename TInput3, typename TOutput>
public delegate TOutput Func(
	TInput1 o1, 
	TInput2 o2, 
	TInput3 o3
)