I've created a new project, with the same test code in both Desktop and Store. In it, I'm mocking the System.Net.Http.HttpClient object and it's GetByteArrayAsync method.
As I hope you can see, the Desktop one runs fine, but the Store version fails on
httpClient.Arrange(client => client.GetByteArrayAsync(Arg.AnyString)).Returns(GetByteArray());
with the error:
Unable to load resources for resource file "Telerik.JustMock.Messages" in package "b56f7b53-edda-4fa2-89a4-214c7a0bc58b".
As far as I can see, the code is identical in both, except for one is a Windows Store app. I was really hoping that the Desktop version would fail with a useful error, but it wasn't to be ...
ah - can't attach the zipped project - where can I send it please?