static void Main(string[] args)
{
Sello.mensaje = "";
Console.Write(Sello.Imprimir());
Console.WriteLine();
Sello.mensaje = "45";
Console.Write(Sello.Imprimir());
Console.ReadLine();
}
public static void ImprimirEncolor()
{
Console.BackgroundColor = Sello.color;
Console.WriteLine(Sello.Imprimir()); //Encapsulamiento
}