using System;

​

namespace CustomExceptionHandling

{

   //Custom User defiened Exception Created here, using Exception as base class

    public class TestCustomException : Exception

    {

        public TestCustomException(string message) : base(message)

        {

            this.HelpLink = "Visit to qawithexperts.com for more information";

            this.Source = "This is source of Error";

        }

    }

    //Usual Class with method Show(), which throws Exception with message

    public class MyClass

    {

        public static void Show()

        {

            throw new TestCustomException("This is Custom Exception example in C#");

        }

    }

    public class Program

    {

        public static void Main(string[] args)

        {

            //enclose method inside try

            try

            {

                MyClass.Show();

            }

            //catch User defined Exception

            catch (TestCustomException ex)

            {

                //Show Custom defined Error messages

                Console.WriteLine("Error Message:-" + ex.Message);

                Console.WriteLine("Hyper Link :-" + ex.HelpLink);

                Console.WriteLine("Source :- " + ex.Source);

            }

        }

    }

}

​