Source unreachable when using the NuGet Package Manager Console

Question

We are moving our package management from manually updating files to NuGet. I am trying to install older versions of packages to match the one we already have in source cont

Answer 1

I'm not sure what can cause your issue, but there is indeed a way to override package sources on a per-solution basis, but only if you've enabled NuGet Package Restore on the given solution.

Once a solution has enabled NuGet Package Restore a folder called ".nuget" gets added to the solution. Under this will be a file called "NuGet.targets" that has an ItemGroup whose Condition is " '$(PackageSources)' == '' " like the one you'll see in the attached image.

If the ItemGroup is empty (or completely commented out, as in the illustration) then the solution will use a specific file that should be the same as the sources listed under TOOLS >> OPTIONS. But if you uncomment or add PackageSource items to that ItemGroup the solution will search the package sources listed and ONLY the ones listed.