Blend “Window is not supported in a WPF Project”

Question

I am having a frustrating time with Blend reporting \"Window is not supported in a Windows Presentation Foundation (WPF) project.\" due to unbuildable configurations but can\'t

Answer 1

On my side, I solved the problem this way:

• the AnyCPU trick (but not enough...)
• Unload project, edit project file, look at 4.0 framework references and change them to 4.5 (target and minial required version).

rebuild solution, then Blend Preview for WPF 4.5 stopped to show the error messsage (window is not supported...).

Thanks all for putting me on the track !