using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter a character");

        char vowel=char.parse(Console.Readline());

        swich(vowel) 

        {

            case('a');

            case('e');

            case('i'); 

            case('o');

            case('u');

            Console.WriteLine("you enter a vowel");

            Console.ReadLine();

            break;

            default:

            Console.WriteLine("you enter a consonant ");

            Console.ReadLine();

            break;

        }

    }

    }

​