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I'm having a particularly difficult refactoring session involving a C# solution with multiple projects in Visual Studio 2012. I needed to pull out a bunch of code into their own assemblies so that code could be shared across several projects, all in the same solution. However, no matter what I try, I get warnings for the projects that reference the new shared projects that "All projects referencing {shared project name} must install nuget package Microsoft.Bcl.Build".
I have been over the dependent projects and the shared projects with a fine-tooth comb, verifying in detail that they all use the same version and exact same DLL for the Microsoft.Bcl version 1.0.1.19 and Microsoft.Bcl.Async version 1.0.16 packages:
System.Threading.Tasks
Microsoft.Threading.Task
The DLL paths are all resolved and identical. The XAP file does build but I still get that warning telling me that Microsoft.Bcl.Build is not referenced in the dependent projects, despite the fact that I can see that it is.
If I try instead to uninstall and then reinstall those two packages using NuGet for each project involved, I get references with empty paths and the warning icon for the 5 DLL references involved. For some reason NuGet adds the references but can't find the DLLs. Also, if I do this, I find myself with the problem frequently of having projects where I get the "Can't add reference" error when trying to add a reference. Then I have close and re-open the solution, and that leads to a "project failed to load" error. So I have to edit the project file manually, remove the faulty package import statements, and reload the project.
How can I fix this problem and what is the general technique for avoiding this headache in the future? Letting NuGet manage missing packages didn't help at al.
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This package provides build infrastructure components so that projects referencing specific Microsoft packages can successfully build. Do not directly reference this packages unless you receive a build warning that instructs you to add a reference.
Set up Visual StudioIn Visual Studio, select Tools, and then select Options. Select NuGet Package Manager, and then select Package Sources. Enter the feed's Name and Source URL, and then select the green (+) sign to add a new package source.
Menu Tools → Options → Package Manager Click OK. Drop your NuGet package files in that folder. Go to your Project in Solution Explorer, right click and select "Manage NuGet Packages". Select your new package source.
In case anyone else comes across this and @Swell's solution made you go "wtf":
I recently went through an older MVC project and updated it (updated razor, asp, http, etc. nuget packages). The project, independent of itself, built fine, but when i went to publish it failed with the OP's errors.
It turns out it's because I didn't update the *.Tests project associated with it (should have figured, though not sure why Tests is that closely tied to the project). So, to fix:
You should now be good and it shouldn't bark at you. Hope that helps others.
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I just came throught the same issue and a bug is opened here: http://nuget.codeplex.com/workitem/3268
What I've done is the following, I added to the solution level the package Microsoft.Bcl.Build
In my dev env if you don't have the package loaded, just right click the solution and select manage nuget packages, you see a yellow bar with a restore button, just click it and you will be fine.
In my build script before compiling the project I run this command:
.\myproject\.nuget\NuGet.exe install .\myproject\.nuget\packages.config -OutputDirectory .\myproject\packages
This will restore solution level packages and you will be fine.
This should be fixed by the end of this summer in version 2.7 according to the issue report
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