Public Class MyClass
Event MyPropChanged()
#Region "Variablen"
   'Deklerationen
   Private m_MyProp As New List(Of String)'ist nur ein Beispiel
#End Region
   Public Property MyProp() As List(Of String)
      Get()
          Return m_MyProp
      Set(ByVal value As List(Of String))
          MyProp = value
          RaiseEvent MyPropChanged
   End Property
End Class
 
'Das Formular, so wie ich es machen würde
Public Class frmMain
   Private WithEvents x As New MyClass
   Private Sub frmMain_Load(ByVal sender As Object, e As _
     System.EventArgs)Handles MyBase.Load
      x.Add("Hallo")
   End Sub
   Private Sub x_MyPropChanged()Handles x.MyPropChanged()
      MsgBox("Es wurde geändert!")
   End Sub
End Class