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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Throw
{
    class Program
    {
        static void Main(string[] args)
        {
            int i =int.MaxValue ;
            int j = int.MaxValue;
            int z = i + j;//-2，默认就是int z = unchecked(i+j);
            Console.WriteLine(z);
            try
            {
                int x = checked(i + j);
            }
            catch (OverflowException ex)
            {
                Console.WriteLine(ex.Message);
            }
            Console.ReadKey();
        }
    }
}