Visual studio 2015 project missing all references

Question

Starting from today, a WPF project that belongs to a solution with 20 projects, set all my references to missing

I\'ve just checked the MS suggestion and the othe

Answer 1

The resolution to this issue is.

Whenever you import a project to VS 2015 it modifies your .csproj. So, in order to fix it. Right click on .csproj and open it in notepad or any editor and delete the following

<Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
  <PropertyGroup>
    <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
  </PropertyGroup>
  <Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
</Target>

Then build your solution and it should work.

Answer 2

It can help to force rebuild the nuget packages. Go to the nuget console and use the following commands: (TOOLS > Options > Package Manager > Package Manager Conbsole)

Update-Package -reinstall -ProjectName "MyProject" -safe

The safe parameter will actually not update the packages, but only reinstall them. If that didn't help, you can try to actually update them (but make sure you have a copy of the project somewhere, just in case.)

Update-Package -reinstall -ProjectName "MyProject"

To force update just one package, use:

Update-Package -id Microsoft.Package.Name -ProjectName "MyProject"

Answer 3

This error may occur if you miss .targets file in nuget packages folder. In my case it was packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets

Usually it happens when I'm adding packages to git repository (common .gitignore file is ignoring build folder everywhere) and checkout on another computer.

Tip: you can modify .gitignore file to include all files in packages folder. Append these lines to the bottom:

# Include all files in NuGet packages directory
!/packages/**/