using System;

//this project throws an exception

//along with defining your own exception

​

class MyThreeException : Exception {} //created my own exception

​

public class Program

{

    public static void Main()

    {

        int result;

        try

        {

            result = MyMath.AddEm(1, 2);

            Console.WriteLine("Result of AddEm(1,2) is {0}", result);

            result = MyMath.AddEm(3, 4);

            Console.WriteLine("Result of AddEm(3,4) is {0}", result);

        }

        catch (MyThreeException) //using my exception

        {

            Console.WriteLine("No Adding three's!");

        }

        catch (Exception e)

        {

            Console.WriteLine("Exception caught {0}",e);

        }

        Console.WriteLine("End of program");

    }

}

​

class MyMath

{

        static public int AddEm(int x, int y)

        {

            if (x==3 || y ==3)

            {

                throw(new MyThreeException() ); //using and throwing my own exception

            }

            return (x + y);

        }

}