[StartCode]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string endInput = " ";

            while (endInput != "exit")
            {
                Console.Write("Для выхода напишите 'exit':");
                endInput = Console.ReadLine();

            }

        }
    }
}
[EndCode]