Why can't I use the modal dialog (child window / top level window) in XBAP application?

Question

I have XBAP application and I wanted to understand why can't I use modal windows (child/ top level window) in spite of Full Trust Mode

In other words, why the ShowDialog method is asynchronously called when used in XBAP?

Thanks for you answer.

Answer 1

The ShowDialog method in XBAP is asynchronous - this means that it returns immediately and shows a modal window (it works like in Silverlight). In WPF desktop application this method is synchronous - this behavior comes from the standard Window control.
The window that is shown when you call the ShowDialog method is still modal, no matter it is shown asynchronously. there is a work around for that, I didn't liked it tho : How to implement modal dialog for XBAP