Hi Kamka,
This forum is discuss Visual Studio WPF/SL Designer, Visual Studio Guidance Automation Toolkit, Developer Documentation and Help System, and Visual Studio Editor.
According to the error message, this problem is caused by the Enumeration.DeviceInformation can't be resolved. Please check whether all needed assemblies are contained in the path of TestLib.dll.
And based on the last sentence, you need to use the ReflectionOnly APIs to resolve in the ReflectionOnlyNamespaceResolve event. Please refer to the code in below thread, which has the similar problem. Hope that can help you.
http://stackoverflow.com/questions/18101011/reflecting-a-winrt-executable-from-a-net-4-x-app
Best Regards,
Weiwei