using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Grades
{
    class Program
    {
        static void Main(string[] args)
        {
            char grade = ' ';

            Console.WriteLine("Press Control+C to end");
            while (true)
            {
                Console.WriteLine("Please Enter Grade");
                grade = Convert.ToChar(Console.ReadLine());

                switch (grade)
                {
                    case 'A':
                        Console.WriteLine("Excellent");
                        break;
                    case 'B':
                        Console.WriteLine("Very G00D");
                        break;
                    case 'C':
                        Console.WriteLine("GOOD");
                        break;
                    case 'D':
                        Console.WriteLine("Better Try Again");
                        break;
                    default:
                        Console.WriteLine("INVALID GRADE");
                        break;
                } //end switch
            } //end while

            Console.WriteLine("Your Grade is {0}", grade);
            Console.ReadLine();
        }
    }
}