using System;

public class Program

{

static void Main(string[] args)

{

    Console.Write("Enter a character: ");

    Char c; 

    while(!Char.TryParse(Console.ReadLine(), out c))

    {

        Console.Write("Invalid Input, re-enter: ");

    }

​

    switch (c){

        case 'a':

            Console.WriteLine("Is a Vowel");

            break;

        case 'e':

            Console.WriteLine("Is a Vowel");

            break;

        case 'i':

            Console.WriteLine("Is a Vowel");

            break;

        case 'o':

            Console.WriteLine("Is a Vowel");

            break;

        case 'u':

            Console.WriteLine("Is a Vowel");

            break;

        default:

            Console.WriteLine("Is a consonant");

               break;

    }

}

}