egn

using System;

class Program
{
    static void Main()
    {

        bool isTrue = true;
        string egn = string.Empty;

        while (isTrue)
        {
            egn = Console.ReadLine();

            if (egn.Length == 10)
            {
                Console.Write("The egn is correct: ");
                isTrue = false;
            }
            else
            {
                Console.WriteLine("The egn is incorrect. Please, try again");
                continue;
            }
        }
        Console.WriteLine(egn);
    }
}