The Name "Xyz" Does Not Exist in the Namespace "Clr-Namespace:Abc"

The name XYZ does not exist in the namespace clr-namespace:ABC

Your solution is running on a network share. .Net (and Visual Studio) applications can run into permission / access issues when running on a network share.

Copy your solution to a local drive (with full trust) and you should be fine.

It is possible to get a network drive working with full trust - you can find answers for this on StackOverflow and other places - but in my experience I keep running into obstacles when I do this, so try to avoid it unless it's absolutely critical to the problem at hand.

E.g. this question gives instructions about how to do this:

Give FullTrust to UNC share for Visual Studio 2012 and .Net 4.0

I've only ever tried this with VS2010 so (as indicated in the link) you might have better joy with 2012.

The name does not exist in the namespace clr-namespace:

Wrap your MainWindowViewModel class in

Namespace ViewModels
  Public Class MainWindowViewModel
  Inherits ViewModelBase
...
  End Class
End Namespace

And then add a new namespace to your window:

xmlns:vm="clr-namespace:Koala.ViewModels"

And use the vm prefix instead of local in your resources declaration.

Silly F#\WPF error - The Name 'abc' does not exist in the namespace 'xyz' even though Intellisense sees it

Thanks to the comment from @Terrance, I manually deleted my "\bin" folder from the WPF solution, restarted Visual Studio and rebuilt my solution. Problem solved. Silly me.

The nameabc doesnot exist in namespace clr-namespace:abc

You cannot refer to nested classes in xaml. Heres what MSDN says about nested classes

http://msdn.microsoft.com/en-us/library/ms753379.aspx

Your custom class must not be a nested class. Nested classes and the
"dot" in their general CLR usage syntax interfere with other WPF
and/or XAML features such as attached properties.

you can take out your ProjectObject class out of Window class

namespace PstImporter
  {

     public class ProjectObject
    {
        public string Name { get; set; }
        public string Executor { get; set; }
    }
  }

Then you can refer to it

xmlns:local="clr-namespace:PstImporter"

<local:ProjectObject>

The name does not exist in the namespace

Change property of colors.cs "Copy to Output Directory" to "Copy Always" and it's work!

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