Nuget error: The underlying connection was closed

ERROR: Visual Studio 2010 nuget error: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.

Solution:

Go to VS2010 -> Tools -> Library Package Manager -> Package Manager Settings

Choose Package Manager -> Package Sources.

1. Add a new package source as:

Name= NugetSource

Source= http://packages.nuget.org/v1/FeedService.svc/

2. Move Up the newly added package source to first position.

3. UnCheck existing "Nuget official package source"

4. Restart VS2010.