Undefined CLR namespace

Question

I have the following:

The error says The \'clr-namespace\' URI refers to a na

Answer 1

Judging from your screenshot, your ViewModel folder seems to be empty. If there are no classes in the namespace BlooblieBlablie.ViewModel, the namespace does not exist yet.

Answer 2

I had the same error message given to me. But the underlying problem was different. I moved my MainWindow.xaml to a different folder, and I forgot to update my App.xaml StartupUri. I then updated my StartupUri in my App.xaml and the problem was fixed.

Answer 3

I had similar problem when project's solution platform was set to x64. When I changed it to x86 problem went away.

Here is some explanation: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/6379d330-f382-4b4d-a690-e89326ab4c72

Answer 4

I had the same problem today after I had to rename class (and file with it) in the namespace. So I was able to solve it by deleting .sln file, then run .csproj and recreate .sln file.