This is WPF only and not applicable for Silverlight.

As a user of the RadWindow control I want to be able to close it only by setting the DialogResult property without calling the Close method so that I can use it easily in MVVM scenarious.

As a <role> I want <ability> so that <benefit>.

Property for example.

Available with the R3 2016 SP1 release. 

Setting the Owner property to null in order to detach the minimize behavior of linked RadWindow instance to its owner does not take effect unless the RadWindow instance is closed and reopened.

Available with the R3 2016 SP1 release. 

The issue is reproducible when the DPI is changed at runtime(new feature introduced with Windows 10) and therefore the application is not notified for the change. In order the application to be aware of the change the user have to logout and sign in (or the application should be DPI aware).

Popup shows behind RadWindow when using two monitors in Windows XP.

As a workaround you can set:  window.CaptionHeight= 0;

Maximizing RadWindow from the header button shows a window with the size of the content if SizeToContent = true. If you maximize with double click on header it is ok.

1) Open WPF Demos and maximize it
2) Open "Alert, Prompt and Confirm" sample
3) Click "Confirm"
4) Minimize all windows (for example, by using Win+D)
5) Switch to WPF Demos again
6) Now you can't do anithing with the window, even close it. You can use task manager to close it.

If a ContentControl is placed inside the control and the ResizeMode is set to NoResize the SizeToContent doesn't take effect.

As a workaround all you need to do is set the ResizeMode to NoResize in the Loaded event of the ContentControl.

As a developer I want to be able to open a modal window that doesn't block the thread so that calling thread stays active while the modal dialog is open (like in Silverlight and XBAP). Create a blog post demonstrating how to use the Show method to simulate this behavior.

This can be observed only when AllowTransparance is set to false.

It can be reproduced with the Show method of the window or with Dock, ToolWindows and the save - load functionality.