How do I install a NuGet package .nupkg file locally?

Question

I have some .nupkg files from a C# book. How can I install them?

Answer 1

Menu Tools → Options → Package Manager

Give a name and folder location. Click OK. Drop your NuGet package files in that folder.

Go to your Project, right click and select "Manage NuGet Packages" and select your new package source.

Here is the documentation.