สอบถามเรื่องความหมายและความแตกต่างของการใช้งาน () ครับ

    Public Shared Function LoadControl(ByVal FullPathAndFullName As String, ByVal ParamArray ctorParameters As Object()) As UserControl
        Dim p As Page = HttpContext.Current.Handler
        Dim ctorTypes As New List(Of Type)()
        For Each ctp As Object In ctorParameters
            ctorTypes.Add(ctp.GetType())
        Next
        Dim ctrl As UserControl = DirectCast(p.LoadControl(FullPathAndFullName), UserControl)
        Dim constructor As Reflection.ConstructorInfo = ctrl.GetType().BaseType().GetConstructor(ctorTypes.ToArray()) 'OK Working
        Dim constructor As Reflection.ConstructorInfo = ctrl.GetType().BaseType.GetConstructor(ctorTypes.ToArray()) 'Sometime IS Null/Nothing
        Return ctrl
    End Function

        Dim constructor As Reflection.ConstructorInfo = ctrl.GetType().BaseType().GetConstructor(ctorTypes.ToArray()) 'OK Working
        Dim constructor As Reflection.ConstructorInfo = ctrl.GetType().BaseType.GetConstructor(ctorTypes.ToArray()) 'Sometime IS Null/Nothing

BaseType()
BaseType