Msbuild v15 can't resolve the variables of metadata of nuspec file

Question

I know Since the release of msbuild 15 (vs 2017) that NuGet is now fully integrated into MSBuild.

I have a nuspec file with defining variables of package properties

Answer 1

As has been mentioned in the comments, you no longer need a Nuspec file as most aspects can be controlled via properties in the csproj file or additional metadata on items (e.g. if you need additional content).

If you do need a nuspec file for some reason, you need to provide the variables for substitution yourself. You can do this in a target inside the csproj file like this:

  
    $(NuspecProperties);id=$(AssemblyName)
    $(NuspecProperties);config=$(Configuration)
    $(NuspecProperties);version=$(PackageVersion)
    $(NuspecProperties);description=$(Description)
    $(NuspecProperties);authors=$(Authors)