Nuget 程序包源http不安全手动添加AllowInsecureConnections设置为true

1. 用户级配置文件地址

Windows: %AppData%\NuGet\NuGet.Config

如我的：C:\Users\yourUser\AppData\Roaming\NuGet\NuGet.Config

2. 全局配置文件地址

Windows: %ProgramFiles(x86)%\NuGet\Config\NuGet.Config

如：C:\Program Files (x86)\NuGet\Config

3. 做以下修改

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
    <add key="MyHttpSource" value="http://mycompanyrepo.com/nuget/" allowInsecureConnections="true" />
    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
  </packageSources>
</configuration>