https://docs.microsoft.com/en-us/nuget/consume-packages/package-restore#forcing-restore-from-package-sources

By default, NuGet restore operations use packages from the global-packages and http-cache folders, which are described on Managing the global packages and cache folders.

To avoid using the global-packages folder, do one of the following:

• Clear the folder using nuget locals global-packages -clear or dotnet nuget locals global-packages --clear
• Temporarily change the location of the global-packages folder before the restore operation using one of the following methods:
  • Set the NUGET_PACKAGES environment variable to a different folder.
  • Create a NuGet.Config file that sets globalPackagesFolder (if using PackageReference) or repositoryPath (if using packages.config) to a different folder (see configuration settings
  • MSBuild only: specify a different folder with the RestorePackagesPath property.

To avoid using the cache for HTTP sources, do one of the following:

• Use the -NoCache option with nuget restore or the --no-cache option with dotnet restore. These options do not affect restore operations through the Visual Studio Package Manager UI or Console.
• Clear the cache using nuget locals http-cache -clear or dotnet nuget locals http-cache --clear.
• Temporarily set of the NUGET_HTTP_CACHE_PATH environment variable to a different folder.

 

执行这2个命令

nuget locals global-packages -clear

Use the -NoCache option with nuget restore