Somehow during the upgrade to VS2012 and .NET 4.5, I’ve managed to get NuGet confused. There are packages that appear in the package manager (and the packages folder) that I cannot delete (I believe they are legacy ASP.NET NuGet packages that have been replaced with new package names with the new version. They each have only a Manage button — but no uninstall button. And when you look to see where they are used, you can see that they are referenced by none of the solution’s projects? They are NOT displaying an Uninstall?
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You can use Package Manager Console with command:
Uninstall-Package PackageIdto remove it, or just delete package folder from ‘packages’ folder under solution folder.More information about Package Manager Console you can find here: http://docs.nuget.org/docs/reference/package-manager-console-powershell-reference