The idea is to let a simple property have the RadWindow close on outside click like the RadLightBox: http://demos.telerik.com/aspnet-ajax/lightbox/examples/overview/defaultcs.aspx. At the moment, a few lines of code are needed and you can find examples here: http://www.telerik.com/forums/close-modal-on-overlay-click#DGbE7tSl3kWR926gm99m9A.
An example of achieving that is available here https://www.telerik.com/support/code-library/close-the-radwindow-object-on-click-outside-the-window
deleted by aarash.gharagozloo
This would be really nice to have!