using System;

​

/*

    Write a program and ask the user to enter 5 numbers. 

    If a number has been previously entered, display an error message and ask the user to re-try. 

    Once the user successfully enters 5 unique numbers, sort them and display the result on the console.

*/

​

public class Program

{

    public static void Main()

    {

        //Variables

        int[] numbers = new int[5];

        string[] numberStrings = new string[5] {"First", "Second", "Third", "Fourth", "Fifth"};

        for (var counter = 0; counter <= 4; counter++)

        {

            Console.Write("Enter {0} Number: ", numberStrings[counter]);

            numbers[counter] = Convert.ToInt32(Console.ReadLine());

        }

    }

}