Removing a package reference for one project can break build for other projects

[jeffkl]

Reported by customer:

I have a project A that has taken a dependency on NuGet package ABC.

There are, say, twenty other projects that also have a dependency on NuGet package ABC.

I decide that project A no longer needs to depend on package ABC. So with project A open in Visual Studio, I go to Manage NuGet Packages for project A, find ABC and click "Uninstall."

This actually removes the package from the centralized 'packages' folder, breaking the other twenty projects that depend on it.

The build tools don't notice and local builds will fail until the package is restored manually.

We need to investigate how to make this scenario work!