SOLVED: Windows.Storage Namespace Not Found Error

SOLVED: Windows.Storage Namespace Not Found Error

Windows.Storage Namespace not found error appears during utilizing Visual Studio on Windows 10 as well as the latest Windows 11 system.

Whereas for some users the error appears while trying to build the UWP (Universal Windows Platform) and they see the error message Windows.Storage namespace not available or not found.

The error commonly appears when not using the object browser correctly or due to the missing DLL files on the computer.  The error is a result of the problem from the user end.

Luckily the error is not very problematic and gets fixed easily by following the step-by-step instructions.

How to Fix “Windows.Storage Namespace Not Found” Error?

Solution 1: Manually Add the References to UWP DLLs & WINMD files

To fix the error it is recommended to add the reference to UWP DLLs and WINMD files manually. As if it is not added properly, it results in causing the problem.

Follow the steps to do so:

  • Launch Visual Studio and open the project.
  • The Solution Explorer will then open in Visual Studio once you select “View” from the menu bar.
  • To access it, right-click the “References” tab on the Solution Explorer page and select “Add Reference…

Windows.Storage Namespace Not Found

  • Go to the Browse tab in the Reference Manager box.

Windows.Storage Namespace Not Found

  • Next, click Browse… to open the DLL file.
  • And go to the location

C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1

  • Try to find the DLL file. From the drop-down menu, choose “All files“.
  • Now choose the System.Runtime.WindowsRuntime.dll DLL file.
  • Click on “Add” to include the DLL file in your project after that.

Windows.Storage Namespace Not Found

  • Once the DLL file has been added, try running the build test on your PC.

It is estimated now the error is resolved and won’t appear but if still seeing the Windows.Storage Namespace not found error then follow the next solution.

Solution 2: Declare the Variable Globally

If you are still seeing the error then check if you have declared the Windows.Storage.ApplicationData variable as a global variable. If not then follow the steps given to do so:

Simply add the following to your code:


Run each test after that while using the build. After the subsequent fix, you can use the global object browser if the error still exists.

Solution 3: Make Proper Use of the Object Browser

An Object Browser allows a user to examine the components involved in a software package and by default, this is set to all components. So here it is suggested to correctly use the object browser and solve the error.

  • Open up Visual Studio and load the build.
  • Next, open an object browser by clicking on “View” in the navigation tab. You can also press the keys Ctrl+Alt+J.
  • Now select “All Components” from the drop-down option for “Browse.”

Windows.Storage Namespace Not Found

  • The components will load in a long list.
  • Choose the System.Runtime.WindowsRuntime.dll
  • Then, to add it to the code, tap on the “Add to References in Selected Project” icon in the Object browser.

Windows.Storage Namespace Not Found

  • And now the reference object to the project library is added.

It is estimated now the Windows.Storage Namespace not found error on Windows 10 is fixed.

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So, this is all about the Windows.Storage Namespace Not Found error on Windows 10. It is estimated after following the solutions listed the error is fixed.

Make sure to follow the solutions given one by one till you find the one that works for you.

Moreover, if you have any queries or suggestions then feel free to tell us about it, and reach out to us on Facebook or Twitter. We are open to new ideas that can help enhance the user experience.

Good Luck..!