Bdtjtk

Go to

Settings ( Global Settings of your PC ) > Network and Internet > Proxy > Automatic Proxy Setup > and set Automatically detect settings to off.

The error can be caused by just temporary network issue, and disappear, if try again.

In support of the answer provided by @Eddie Chen (here) I had to add http_proxy setting to following file as well:

C:Windowssystem32configsystemprofileAppDataRoamingNuGetNuGet.Config

<add key="http_proxy" value="http://your_proxy_url:8080" />

Something may have change your proxy setting, like Fiddler. Close Fiddler, then close Visual Studio and open it again.

I was getting this same error while running RUN dotnet restore in my Dockerfile using docker-compose up command in Windows 10.

I have tried all the possible solution provided on the internet and was also keep an eye on this open issue. Finally, after spending more than 8 hours, by following the preceding steps, I was able to fix my issue.

1. Uninstall Docker from your system


2. Restart your system


3. 
   

   Install Docker from this link. Below is the version of my Docker

   
   
   

   

   
   



4. Restart your system




5. Start Docker for Windows, search Docker in the search bar in Windows. Make sure it is running.



6. 
   

   You should also go to Services.msc and make sure the services Docker Engine and Docker for Windows Service are running.

   
   
   

   

   
   


7. 
   

   At last, you must check your Nuget.config file from C:UsersSibeeshAppDataRoamingNuGet. For me, the content of that file was as below.

   
   
   

   <?xml version="1.0" encoding="utf-8"?>
<configuration>
<packageSources>
<add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
</packageSources>
<packageRestore>
<add key="enabled" value="True" />
<add key="automatic" value="True" />
</packageRestore>
<bindingRedirects>
<add key="skip" value="False" />
</bindingRedirects>
<packageManagement>
<add key="format" value="0" />
<add key="disabled" value="False" />
</packageManagement>
</configuration>

   
   
   

   Hope this helps.

   
   

I was getting the same error while trying to browse the NuGet Package, to resolve the same followed below step

1- go to %appdata%NuGetNuGet.config

2- Verify the urls mentioned in that config

3- Remove the url which is not required

4- Restart visual studio and check

I have stumbled across this issue when trying to run nuget.exe via Jenkins (configured as a service, by default using Local System account). I have edited C:WindowsSystem32configsystemprofileAppDataRoamingNuGetNuGet.Config file which looks like the following:

<?xml version="1.0" encoding="utf-8"?>

<configuration>

    <config>

        <add key="http_proxy" value="http://proxy_hostname_or_ip:3128" />

        <add key="https_proxy" value="http://proxy_hostname_or_ip:3128" />

    </config>



  <packageSources>

    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />

  </packageSources>



</configuration> 

In order to test command prompt can be started via PSTools:

psexec -i -s CMD

and actual test run in the newly created cmd windows (runs as Local System):

path_to_nugetnuget.exe restore "path_to_solutiontheSolution.sln"

Some development environment may not be using neither a browser nor a proxy.

One solution would downloading the package from nugget such as the https://dotnet.myget.org/F/dotnet-core/api/v3/index.json to a shared directory then execute the following:

dotnet add package Microsoft.AspNetCore.StaticFiles -s "shared drive:index.json"

I hope that works for you.
 

Go to -> Tools -> Extensions and Updates and uninstall NuGet package manager.. restart visual studio and reinstall it.... every thing will set to normal

In my case i had had Fiddler running which had changed my proxy settings