Question

Can any one translate the following syntax to vb.net.

m_TextBox.Loaded += TextBoxLoaded
m_TextBox.Loaded -= TextBoxLoaded;
private void TextBoxLoaded(object sender, RoutedEventArgs e)
 {
   Init();
 }

..
containsTextProp.AddValueChanged(m_TextBox, (sender, args) => UpdateAdorner());
...
private void UpdateAdorner()
        {...}

Answer 1

Here it is:

AddHandler m_TextBox.Loaded, AddressOf TextBoxLoaded
RemoveHandler m_TextBox.Loaded, AddressOf TextBoxLoaded

Private Sub TextBoxLoaded(ByVal sender as Object, ByVal e as RoutedEventArgs)
    Init()
End Sub

Your call to AddValueChanged can’t be directly translated, as VB.NET’s lambda expression support is not as robust as C#’s. In particular, VB.NET lambdas must be an expression, so you must either return a value or call a Function. In your case, you would be calling a Sub, which isn’t allowed in VB.NET. You should consider changing the signature of UpdateAdorner to be a standard event handler (like the TextBoxLoaded method) and pass AddressOf UpdateAdoerner to AddValueChanged.

Like this:

containsTextProp.AddValueChanged(m_TextBox, AddressOf UpdateAdorner);

...

Private Sub UpdateAdorner(ByVal sender as Object, ByVal e as EventArgs)
    ... 
End Sub