All system references missing Visual Studio 2013 NuGet Async

Question

I have a solution/team project set up in visual studio 2013 and for some time have had a working NuGet Microsoft.Bcl Async Package installed for NET Framework 4.0. Today whe

Answer 1

A possible solution: If you are seeing yellow triangles over most of your System references, edit your .csproj file (back it up just in case), scroll to the bottom of the file, and delete these lines...

<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>

Like many others, I've been using a centralized .packages folder outside of source control. This is done by having the following lines in your NuGet.Config file:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <config>
    <add key="repositoryPath" value="..\..\..\.packages" />
  </config>
  <solution>
    <add key="disableSourceControlIntegration" value="true" />
  </solution>
</configuration>

One of the steps in achieving this, is to check your project file does not use the old NuGet.targets file anymore (the only file in your .nuget solution folder should be NuGet.Config).

When NuGet thinks it should check the NuGet.targets file, and it's not there, it will fail checks to basic references too (like System.Core, WindowsBase and PresentationCore).

---

Update: See this related topic/answer on how to completely do away with .nuget folders in your solution! It can be set at user-profile level in your AppData.

Answer 2

I was able to solve this issue by first running an update on all NuGet packages in the solution and then removing and re adding references to the libraries included or overridden by the package.

Answer 3

I had exactly the same problem with my project on team foundation server. I had the error saying "EnsureBindingRedirects" task could not be loaded from the assembly C:\Users...\Visual Studio..." and many warnings saying "The referenced component 'Microsoft.X"

The solution was very easy. All I had to do was copy my entire project folder into another location and it worked.

Answer 4

Had a similar problem. After wasting 2.5 hours trying to find a solution, I fixed it simply by opening the project in VS 2013, enabling NuGet package restore and rebuilding. Fixed immediately and now it works in VS 2015 just fine.

Answer 5

Just had the same problem. The reason for me was that all the files inside the Nuget package, suddenly become 0 byte size. I mean DLLs, nupkg file etc.

I reinstalled the package and it worked for me.