[nuget] How do I delete NuGet packages that are not referenced by any project in my solution?

If you want to use Visual Studio option, please see How to remove Nuget Packages from Existing Visual Studio solution:

Step 1:

In Visual Studio, Go to Tools/NuGet Package Manager/Manage NuGet Packages for Solution…

Step 2:

UnCheck your project(s) from Current solution

Step 3:

Unselect project(s) and press OK