Catch OverflowException Exception for data overflow in CSharp

using System;/* w  w w.  j a  v  a  2  s .c om*/

class MainClass
{
    public static void Main()
    {
        try
        {
            checked
            {
                int Integer1;
                int Integer2;
                int Sum;

                Integer1 = 999999999;
                Integer2 = 2000000000;
                Sum = (int)(Integer1 + Integer2);
            }
        }
        catch (OverflowException)
        {
            Console.WriteLine("A mathematical operation caused an overflow.");
        }
    }
}