A custom exception with HelpLink and Source : Custom Exception : Language Basics C# Examples

    
using  System;

public  class  CustomException  :  ApplicationException
{
    public  CustomException(string  Message)  :  base(Message)
    {
        this.HelpLink  =  "See  the  Readme.txt  file";
        this.Source  =  "My  Program";
    }
}

class  MainClass
{
    public  static  void  Main()
    {
        try
        {
            Console.WriteLine("Throwing  a  new  CustomException  object");
            throw  new  CustomException("My  CustomException  message");
        }
        catch  (CustomException  e)
        {
            Console.WriteLine("HelpLink  =  "  +  e.HelpLink);
            Console.WriteLine("Message  =  "  +  e.Message);
            Console.WriteLine("Source  =  "  +  e.Source);
            Console.WriteLine("StackTrace  =  "  +  e.StackTrace);
            Console.WriteLine("TargetSite  =  "  +  e.TargetSite);
        }
    }
}