1. NuGet use
tool-->options-->Nuget package manager
The last one is domestic mirroring.
Enter the command to download
Update-Package -ProjectName 'MyWindowsFormsBim' -Reinstall
Is it because the file in packages.config may be out of date or for other reasons, and it can't be found in the source.
Comment out the manual application, or upgrade the version.
Comment it out and you can download it again.
2. Manual reference process
A reference in a project, right click to add a reference, click Browse to add a local resource
