NuGet 镜像

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
    <add key="cnblogs.com" value="https://nuget.cnblogs.com/v3/index.json" protocolVersion="3" />
    <add key="azure.cn" value="https://nuget.cdn.azure.cn/v3/index.json" protocolVersion="3" />
  </packageSources>
</configuration>