Unable to load the service index for source https://api.nuget.org/v3/index.json in VS2017?

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I was having same issue in VS 2017. You would need to enable proxy settings for VS, so that it can use existing IE proxy to reach out internet. This is especially useful, for those users, who uses office laptops and proxy settings are managed by group policies and IE settings get updated automatically. It would have been great if there was an option within VS IDE itself to add proxy just like Eclipse IDE has.

Solution

  1. Go to your Visual Studio install location as below –

C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\Common7\IDE

  1. Open devenv.exe.config file as an Administrator.

Add defaultProxy tags as below, within the existing system.net tag –

<system.net>
    <defaultProxy enabled="true" useDefaultCredentials="true">
        <proxy usesystemdefault="true" bypassonlocal="true" />
    </defaultProxy>
  <settings>
    <ipv6 enabled="true"/>
  </settings>
</system.net>
  1. Restart VS.

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