ListBox in Window Fatal Error. No UserControl involved.

[Charlie]

I am constructing a small demo for my employeer, as we are considering to purchase a license for the Silverlight controls. 

This code is using the latest binaries (Trial version).

XAML:

        <Canvas x:Name="WindowSpace">               

            <telerikNavigation:RadWindow x:Name="MyWin">

                <ListBox x:Name="MyListBox" Width="300" Height="200"></ListBox>

            </telerikNavigation:RadWindow>

        </Canvas>

C#:

            MyListBox.Items.Add("First");

            MyListBox.Items.Add("Second");

            MyListBox.MouseLeftButtonDown += delegate

            {

                Telerik.Windows.Controls.RadWindow.Alert("Test");

            };

            MyWin.Show();

Result::

          Uncaught Sys.InvalidOperationException: Sys.InvalidOperationException: ManagedRuntimeError error #4004 in control 'Xaml1':           System.Exception: Oåterkalleligt fel (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))

          And a blank screen in Google chrome.

The problem is associated with the events "SelectionChanged" and "MouseLeftButtonDown". 

If I use "MouseEnter" instead, it works.

I found this thread http://www.telerik.com/community/forums/silverlight/window/select-listbox-content-inside-radwindow-catastrophic-failure.aspx 

But apparantely the problem was that "noticing that you are trying to use the RadWindow control as a UserControl".

That is not the case here. The XAML above is within Page.xaml. This was the simplest possible application I could make to raise the error. What is the work around? Is this fixed in the "full version"?

[Charlie]

Problem solved.

In a previous thread you meantioned that the windows should be opened no sooner than

this.RootVisual = new Page();

It appeares that if I Show(); the Window the Page() constructor, it crash. 

Adding a Loaded-event where i Show() the Windows to LayoutRoot solves the problem.