using System;

public class Program

{

    public static void Main()

    {

        int turn = 0;

        int s = 0;

        int again = 0;

        start:

        Console.WriteLine("Please write your name: ");

        string name = Console.ReadLine();

        Console.WriteLine("Hi {0}, please answer the following questions: ", name);

        Console.WriteLine("Are you in the Morning (1) or in the Evening (2)?");

        turn = Convert.ToInt32(Console.ReadLine());

        if (turn < 1 || turn > 2) {

            goto start; }

        semester:

          Console.WriteLine("Type your semester: ");

          s = Convert.ToInt32(Console.ReadLine());

        if (turn==1 && s<=5 && s>=1)

          {

            goto continuar;

          }

        else if (turn==2 && s<=7 && s>=1)

          {

            goto continuar;

          }

        else 

          {

            goto semester;

          }

        continuar:

        Console.WriteLine("What is your career? (Type de number)");

        Console.WriteLine("1 = Mecatronica");

        Console.WriteLine("2 = Administration");

        Console.WriteLine("3 = Maintenance");

        Console.WriteLine("4 = Technology \n");

        string career = Console.ReadLine();

        int me = 0;

        int ad = 0;

        int ma = 0;

        int tec = 0;

        switch (career.ToUpper())

          {

            case "1":

                me++;

                    break;

            case "2":

                ad++;

                    break;

            case "3":

                ma++;

                    break;

            case "4":

                tec++;

                    break;

            default:

                goto continuar;

    }

        Console.WriteLine("you have selected {0}, finishing...", career);

        Console.WriteLine("Thank you {0}, come back soon!\n", name);

        Console.WriteLine("Do you want to do it again? (yes - 1, no - 2)");

        again = Convert.ToInt32(Console.ReadLine()); 

        if (again == 1);        

        {

            goto start;

        }

  }

}

​