True NuGet $(MSBuildThisFileDirectory)project.assets.json $(UserProfile)\.nuget\packages\ C:\Users\海\.nuget\packages\;D:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages;C:\Program Files (x86)\Microsoft\Xamarin\NuGet\ PackageReference 6.12.1 C:\Users\海\.nuget\packages\microsoft.extensions.apidescription.server\6.0.5