How to install the .NET package Crux.NancyFx.Testing from NuGet with the Package Manager Console in Visual Studio

By Where is my .Net package

.Net
C#
NuGet
Visual Studio
Crux.NancyFx.Testing

Open the project/solution in Visual Studio, and open the console using the Tools > NuGet Package Manager > Package Manager Console command. Run the install command.

Install-Package Crux.NancyFx.Testing -Version 0.2.1