using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public  static void Main()

    {

        // Generate a range of number starting at 5.

        // ... First parameter is the start number.

        //     Second parameter is the count of numbers (not the last index).

       int min = 20, max = 30;

       List<int> list = new List<int>();

       List<int> list1 = new List<int>{ 23, 30,27 };

       for (int i = min; i<= max; i++ )

       {

           list.Add(i);

        foreach (int n in list)

        {

            Console.WriteLine(n);

        }

       }

       var list3 = list.Except(list1).ToList();

      Console.WriteLine("After cehck");

       foreach (int n in list3)

        {

            Console.WriteLine(n);

        }

    }

}

​