Using PluralizationService class in dotnetfiddle

Question

I want to do some tests with the class PluralizationService using dotnetfiddle.net but I get an error:

The type of namespace name 'Design' does not exist in the namespace 'System.Data.Entity'

using System;
using System.Data.Entity.Design.PluralizationServices;

public class Program
{
    public static void Main()
    {
        Console.WriteLine("Hello World");
    }
}

link to the example in dotnetfiddle

I've tried adding a reference to EntityFramework (in the NuGet Packages section) but this has not worked. Does anyone know how to solve this error?