using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
class OverFlowTest
{
	static byte x = 250;
	static byte y = 10;
 
	static int metodoChecked()
	{
		int z = 0;
		try
		{
			z = checked((byte)(x + y));
		}
		catch (System.OverflowException e)
		{
			Console.WriteLine(e.ToString());
		}
		return z;
	}
 
	static void Main()
	{
		Console.WriteLine("El valor de z es: {0}", metodoChecked());
 
		Console.ReadLine();
	}
}