//εφαρμογή switch-case

using System;

​

public class Program

{

    public static void Main() 

    {

        Console.WriteLine("Please type grade: ");

        char grade;

        grade = Convert.ToChar(Console.ReadLine());

        grade = Char.ToUpper(grade);

        switch (grade)

        {

            case 'A':

                Console.WriteLine("Excellent");

                break;

            case 'B':

                Console.WriteLine("Very Good");

                break;

            case 'C':

                Console.WriteLine("Good");

                break;

            case 'D':

                Console.WriteLine("Bad");

                break;

            case 'F':

                Console.WriteLine("Very bad");

                break;

            default:

                Console.WriteLine("Illegal grade");

                break;

        }

    }

}