private static void Main ()
while (vnMes < 1 || vnMes > 12)
Console.WriteLine ('De cuál número del mes quieres saber el nombre');
vnMes = Convert.ToInt32(Console.ReadLine());
case 1: Console.WriteLine
case 2: Console.WriteLine
case 3: Console.WriteLine
case 4: Console.WriteLine
case 5: Console.WriteLine
case 6: Console.WriteLine
case 8: Console.WriteLine
case 9: Console.WriteLine
case 10: Console.WriteLine
case 11: Console.WriteLine
case 12: Console.WriteLine