c# - Custom message for Object reference not set to an instance of an object -

hi
have huge windows application poor exception handling. application throw object reference error lot of places , system error message showing users using message boxes.

i looking simple solution can used replace message user friendly entire application

thanks...

@anz: not use exception handling in every in code keep in mind , must know meaning of different type of exception. in scenario getting "object reference exception" , main reason of exception not checking null while accessing variable like

exa_1:-

dataset ds;

now if acces ds.table.count() give exception, here should use

dataset ds;

 if(ds!=null)  {    int val = ds.table.count();  }  

exa_2:-

     string strvariable=txtinput.text;       int number = convert.int32(strvariable); // here if txtinput.text empty them     through exception here can use 

if(!string.isnullorempty(strvariable)) int number = convert.int32(strvariable);

and if want show custom message in exception handle can create own exception class override exception class can throw , catch like:

public class myexception : exception {     public string custommessage;     public myexception(string sourcename)     {         custommessage = sourcename + " can not null";     }     public myexception()     {         custommessage="objectreferenceexception";     }         } 

and in code usng try catch use

        try         {              throw new myexception("check");         }         catch (myexception ex)         {             messagebox.show(ex.custommessage);         }