WPF User Control

when I initialize wpf user control using Managedhost.control() method in ax 2012 r3 form. It will return NULL. It means it is not initializing in proper way. what is the issue please suggest any help.

What if you try to debug the control (with Visual Studio debugger attached to AX client)?

how can i debug the control which is not initialized???

I expect it fails during the initialization, therefore you should be able to track it to the moment when it fails. You seems to expect that it fails even before calling control’s constructor.