The following are the steps to debug the visual studio designer for WinRT Projects
Ha Ha.... Now you can play with the designer...:)
1.Open the WinRT Project that designer needs to debug
2.Note the (XDesProc process id from the TaskManager as shown in the below image)
3.Open the Same Solution in Another Window
4.Note the New XDesProc process id from the taskmanager this is designer's process needs to debug
5.Go to Debug->Attach To Process in Visual Studio 2012 from the FirstSolution
6.Select the new XDesProc process from the Window
7.Before clicking the Attach important to Change the Attach To ->Managed 4.0,4.5 from the Select Button
8.Boom your BreakPoints in the FirstSolution got Hitted
