using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

         List<int> dataSource1 = new List<int>() { 1, 2, 3, 4, 5, 6 };

            List<int> dataSource2 = new List<int>() { 1, 3, 5, 8, 9, 10 };

            //Method Syntax

            var MS = dataSource1.Except(dataSource2).ToList();

            //Query Syntax

            var QS = (from num in dataSource1

                      select num)

                      .Except(dataSource2).ToList();

            foreach (var item in MS)

            {

                Console.WriteLine(item);

            }

​

    }

}