How do you install NuGet Package Manager?

NuGet is the package manager for Microsoft development platform including Microsoft .NET. NuGet gallery at nuget.org is the central package repository.

NuGet Package Manager is available for the following clients:

• For Visual Studio 2010, 2012 and 2013 through Visual Studio Extension Gallery that you can access from Tools|Extensions and Upgrades... in Visual Studio IDE.
• For WebMatrix 3 in the WebMatrix Extension
• Command-line: http://nuget.org/nuget.exe

This is how you access in Visual Studio 2013 Express for Windows.

How do you manage packages? Read here for details:
http://msdn.microsoft.com/en-us/magazine/hh547106.aspx

How do you install Json.Net from NuGet Packet Manager?
Read here:
http://hodentekhelp.blogspot.com/2015/07/how-do-you-install-jsonnet.html