VB.NET 泛型

Public Function UserHanlde(Of T)(ByVal expression As Boolean, _
                ByVal truePart As T, ByVal falsePart As T) As T
        If expression Then
            Return truePart
        Else
            Return falsePart
        End If
End Function


Public Delegate Function Expression rHanlde(Of T)(ByVal t As T, ByVal y As T) As T