using System;
 
[Flags]
internal enum Bordes
{
	Izquierdo = 1,
	Derecho = 2,
	Superior = 4,
	Inferior = 8,
	Todos = Derecho | Superior | Inferior | Izquierdo
}
 
public class Test
{
	public static void Main()
	{
		for (int i = 0; i <= 16; ++i)
		{
			Bordes borde = (Bordes) i;
 
			Console.WriteLine( "¿El valor `{0}` está definido?: {1}", i, ValorBanderaDefinido(borde));
		}
	}
 
	static bool ValorBanderaDefinido(Bordes e)
	{
		return !(Bordes.Todos & e) != 0;
	}
}

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