how can i send the parameter using url in ASP.NET

Question

Hello Sir/mam How can i send the parameter using the return rul:

 

return url like this-

http://abcdxyz.com/wp-content/plugins/tet-india/web_services_nektonit/thankYou.php?txnID=&status=&msg=

 in this url there are 3 parameter 

1 txn id

2 status   

3 msg 

 

please help me.