Is an Int a 64-Bit Integer in 64-Bit C#

The name does not exist in the namespace error in XAML

When you are writing your wpf code and VS tell that "The name ABCDE does not exist in the namespace clr-namespace:ABC". But you can totally build your project successfully, there is only a small inconvenience because you can not see the UI designing (or just want to clean the code).

Try to do these:

  • In VS, right click on your Solution -> Properties -> Configuration Properties

  • A new dialog is opened, try to change the project configurations from Debug to Release or vice versa.

After that, re-build your solution. It can solve your problem.

The name does not exist in the namespace error in XAML

Your code should works well after you build the project, and it works well in my side using your above code. Try to clean your solution or delete the bin and obj folders in your project then rebuild your app again. Also try to restart your Visual Studio. If it still happens, you can provide a reproducible sample to help me look into this issue.

The name ' ' does not exist in the namespace ' '

This issue in my case was that the project, and the solution had spaces in, whilst the namespace in the code had underscores. Renaming the project and solution so they matched the code, after a clean and build, resolved the problem.

The name does not exist in the namespace in WPF application

I've solved the problem. The reason was that assembly name should be Sample.Common, not Sample.

WPF: The name does not exist in the namespace

One common solution to this known VS bug that you haven't specified as having tried is changing the build target platform.

  1. If your current build target platform is x64, change to x86. If it's currently x86, change to x64.

  2. Clean and Build solution for new target platform.

  3. Change back to desired target platform and re-build.

Name does not exist in the namespace

I figured out what the problem was. It's a glitch in Visual Studio 2015. After you add a namespace in XAML it's best to compile/ test run your program or you will get this problem. To fix it just:

  1. Delete the namespace reference in question and all usages of that reference.
  2. Perform a test run/ compile your program.
  3. Add the namespace reference back into the opening page tag
  4. Perform another test run/ compile your program.
Now when you use your new namespace reference the compiler won't glitch out.

c# WPF 'The name xxx does not exist in the namespace - what am i missing?

You appear to be missing the x:Class directive on your window definition. Update your window element in the XAML:

<Window
x:Class="SimpleDataBinding.MainWindow"
....

the name ... does not exist in the namespace clr-namespace ...

Every time it happend to me i just restarted visual studio, re-built the solution and it worked just fine.. can't say why



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