using System;

public class Program

{

    public static void Main()

    {

         Console.WriteLine("Dummy Value = Exit");

            Console.WriteLine("");

​

            string[] Name = new string[10];

            for (int A = 0; A < 10; A++)

            {

                Console.WriteLine("Enter name:");

                Name[A] = Console.ReadLine();

                if (Name[A] == "Exit")

                {

                    break;

                }

            }

            Array.Sort(Name);

            int B = 0;

            int C = 1;

            foreach (var item in Name)

            {

                if (Name[B] == Name[C])

                {

                    Console.WriteLine("");

                    Console.WriteLine(Name[B] + " is duplicate.");

                }

                else if (Name[B] != Name [C])

                {

                    Console.WriteLine("");

                    Console.WriteLine("No duplicates.");

                }

​

                B++;

                C++;

            }

            Console.ReadLine();

    }

}