using System;

using System.Collections.Generic;

using Newtonsoft.Json;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var x = new List<string>() {"a", "b"};

        var y= new List<string>() {"a", "b"};

​

            Console.WriteLine("and the remainder is" + string.Join(", ", x.Except(y).ToList()));

    }

}

​

​