Version issue with Multi-target projects

[kikaragyozov]

If I have a normal project that only targets one framework, and I define the following target in its .csproj file:

  <Target Name="PopulateNETSDKAssemblyVersion" AfterTargets="_GitPopulateVersionInfo">
    <PropertyGroup>
      <Version>$(GitBaseVersionMajor).$(GitBaseVersionMinor).$(GitBaseVersionPatch).0</Version>
      <FileVersion>$(GitBaseVersionMajor).$(GitBaseVersionMinor).$(GitBaseVersionPatch).$(GitCommits)</FileVersion>
      <PackageVersion>$(FileVersion)</PackageVersion>
      <InformationalVersion>$(FileVersion)+branch.$(GitBranch).commit.$(GitCommit)</InformationalVersion>
    </PropertyGroup>
    <Message Importance="high" Text="PackageVersion: $(PackageVersion)" />
  </Target>

Everything works - when packing the version it's correct. But once we move to a multi-target project, this doesn't do anything.