我正在尝试阻止所有构建使用默认的公开NuGet仓库。

下面是我尝试测试过的配置，但没有达到期望的结果：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
    <clear />
    <add key="Nuget Repository" value="https://nexus.sample.com/repository/nuget.org-proxy/index.json" protocolVersion="3" />
  </packageSources>
  <fallbackPackageFolders>
    <clear />
  </fallbackPackageFolders>
  <packageSourceMapping>
    <clear />
  </packageSourceMapping>
  <auditSources>
    <clear />
  </auditSources>

  <config>
    <add key="restoreSources" value="https://nexus.sample.com/repository/nuget.org-proxy/index.json" protocolVersion="3" />
  </config>
</configuration>

但是当我尝试运行 dotnet restore . 时，似乎仍然同时指向nexus和 nuget.org：

2026-03-19T11:33:12.9932936Z info : Adding PackageReference for package 'Newtonsoft.Json' into project '/mnt/vss/_work/1/s/NuGetSourceTest/NuGetSourceTest.csproj'.
2026-03-19T11:33:13.3623538Z info :   GET https://nexus.sample.com/repository/nuget.org-proxy-v3/v3/registration/5/newtonsoft.json/index.json
2026-03-19T11:33:13.3624203Z info :   GET https://api.nuget.org/v3/registration5-gz-semver2/newtonsoft.json/index.json
2026-03-19T11:33:13.3752863Z info :   OK https://nexus.sample.com/repository/nuget.org-proxy-v3/v3/registration/5/newtonsoft.json/index.json 12ms
2026-03-19T11:33:13.4715883Z info :   OK https://api.nuget.org/v3/registration5-gz-semver2/newtonsoft.json/index.json 109ms
2026-03-19T11:33:13.5649146Z info : Restoring packages for /mnt/vss/_work/1/s/NuGetSourceTest/NuGetSourceTest.csproj...
2026-03-19T11:33:13.6195715Z info :   GET https://api.nuget.org/v3-flatcontainer/newtonsoft.json/index.json
2026-03-19T11:33:13.6457833Z info :   GET https://nexus.sample.com/repository/nuget.org-proxy-v3/v3/content/0/newtonsoft.json/index.json
2026-03-19T11:33:13.6572790Z info :   OK https://nexus.sample.com/repository/nuget.org-proxy-v3/v3/content/0/newtonsoft.json/index.json 11ms
2026-03-19T11:33:13.6746362Z info :   GET https://nexus.sample.com/repository/nuget.org-proxy-v3/v3/content/0/newtonsoft.json/13.0.4/newtonsoft.json.13.0.4.nupkg
2026-03-19T11:33:13.6857291Z info :   OK https://nexus.sample.com/repository/nuget.org-proxy-v3/v3/content/0/newtonsoft.json/13.0.4/newtonsoft.json.13.0.4.nupkg 11ms
2026-03-19T11:33:13.7315254Z info :   OK https://api.nuget.org/v3-flatcontainer/newtonsoft.json/index.json 111ms
2026-03-19T11:33:14.2220303Z info : Installed Newtonsoft.Json 13.0.4 from 
2026-03-19T11:33:14.2353684Z info :   GET https://api.nuget.org/v3/vulnerabilities/index.json
2026-03-19T11:33:14.2377678Z info :   GET https://api.nuget.org/v3/vulnerabilities/index.json
2026-03-19T11:33:14.2378204Z info :   OK https://api.nuget.org/v3/vulnerabilities/index.json 2ms
2026-03-19T11:33:14.2429360Z info :   GET https://api.nuget.org/v3-vulnerabilities/2026.03.19.05.41.43/vulnerability.base.json
2026-03-19T11:33:14.2437575Z info :   GET https://api.nuget.org/v3-vulnerabilities/2026.03.19.05.41.43/2026.03.19.05.41.43/vulnerability.update.json

解决方案

默认的NuGet仓库是：https://api.nuget.org/v3/index.json

默认的NuGet配置文件是C:\Users{User}\AppData\Roaming\NuGet\NuGet.Config

所以你必须先修改它。或者你也可以通过在解决方案根文件夹放置NuGet.Config文件来覆盖此配置。要查看实际应用了哪些配置，请在解决方案上右键点击 -> 为解决方案管理NuGet包 -> 右上角有齿轮图标。

备选方案

如果你在使用 DotNetCoreCLI@2 ，你可以尝试使用 includeNuGetOrg 并将其设置为 false

includeNuGetOrg: true #布尔值。可选。当selectOrConfig = select且 command = restore时使用。使用来自NuGet.org的包。默认值：true