.Net Core项目Nuget软件包无法还原

Question

I want to restore my Identity Server 4 project, after open VS2017 but when package manager try to restore references, it gets fail error every time.

I use latest version of VS2017 and my core packages installed and updated on my pc.

Error The feed 'nuget.org [ https://api.nuget.org/v3/index.json] ' lists package 'Microsoft.AspNetCore.2.1.3' but multiple attempts to download the nupkg have failed. The feed is either invalid or required packages were removed while the current operation was in progress. Verify the package exists on the feed and try again. Unable to find package 'Microsoft.AspNetCore.2.1.3'.

Answer 1

end of central directory record could not be found

According to the message in the error log "end of central directory record could not be found", you can try following troubleshootings to resolve this issue:

• Clean all the NuGet package cache by the command line: nuget locals all -clear .
• Close all Visual Studio instance, then delete nuget.config file in the location: C:\\Users\\leoliu\\AppData\\Roaming\\NuGet\\NuGet.Config , then re-open the Visual Studio to restore nuget packages.
• Check if there is a firewall policy or other proxy settings that block the nuget installation package.

Hope this helps.

Answer 2

Did you try it by Manage NuGet Packages ?

1) Remove IdentityServer4 from Dependencies

2) Open Manage NuGet Packages

3) Browse IdentityServer4 again and install it