User Control Inheritance and Overriden procedures

[shunt]

Hi,

I have a ControlBase object which I am inheriting all of my user controls from and I have overriden a method in the extended user control. This overriden method runs fine most of the time, but every now and again, the application does not run the overriden procedure. It continues excecution as though the method was never overriden.

Here is an example

Public Class ControlBase
    Inherits System.Windows.Forms.UserControl
 
#Region " Windows Form Designer generated code "
 
    Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
        OnBeforeSave()
        OnSave()
        OnAfterSave()
    End Sub
 
    Protected Overridable Sub OnSave()
        '
    End Sub
 
    Protected Overridable Sub OnBeforeSave()
        '
    End Sub
 
    Protected Overridable Sub OnAfterSave()
        '
    End Sub
 
End Class
 
Public Class ExtendedControl
    Inherits WindowsApplication3.ControlBase
 
#Region " Windows Form Designer generated code "
 
    Protected Overrides Sub OnAfterSave()
        MyBase.OnAfterSave()
        MsgBox("hello world from onaftersave")
    End Sub
 
    Protected Overrides Sub OnBeforeSave()
        MyBase.OnBeforeSave()
        MsgBox("hello world from onbeforesave")
    End Sub
 
    Protected Overrides Sub OnSave()
        MyBase.OnSave()
        MsgBox("hello world from onsave")
    End Sub
End Class

The excecution path looks like this:
ControlBase -> btnSave_Click
ExtendedControl -> OnBeforeSave
ControlBase -> OnBeforeSave
ControlBase -> OnSave
ExtendedControl -> OnAfterSave
ControlBase -> OnAfterSave

I thought I had done something wrong, but it sometimes runs the overriden code and sometimes not. Has anyone else had this problem or am I just smoking something?

Win2ksp3
.NET 2003
Framework V1.1.4322