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I am getting the following Visual Studio 2012 error after upgrading to Windows 8.1 when I try to open any Windows 8 store app using XAML/C#:

Missing file

The imported project "...\MSBuild\Microsoft\WindowsXaml\v11.0\Microsoft.Windows.UI.XAML.CSharp.targets" was not found. Confirm that the path in the declaration is correct, and the file exists on disk.

I do not have a WindowsXaml folder in \MSBuild\Microsoft. I also have just done a clean install of VS2012 and an upgrade to Windows 8.1 as before this I was getting the following error (one of many, but this was the prevalent one) with Windows 8 and XAML designer: Argument null exception, if there is any chance that could be related.

I have also viewed the following threads and added the VisualStudioVersion environment variable, which has not helped.

So ideally I am looking for a solution that will just allow me to open a Windows 8 store app in Visual Studio 2012 running Windows 8.1 as you would expect it to work.

I cannot use Visual Studio 2013 for this as the Windows 8 labs at university (for which I am trying to do this) will be up and running soon and they use Visual Studio 2012, and that is where my team will need to continue working on this project.

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Vixxd
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1 Answers1

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The problem appears to have been caused by re-installing VS2012 on my SSD rather than my HDD (which I did to try and remedy my first error, which is back). The missing folder, WindowsXaml, was present in MSBuild on my HDD, B:\, but not on the SSD, C:\, for whatever reason the installation process did not pick up on this. This issue is now resolved.

I am now back to the previous XAML designer error that I had in the first place, "System.ArgumentNullException Value cannot be null. Parameter name: key".

Vixxd
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