Thanks for yor reply. You are right, I am not able to access for outside what is the reason? and where the actual complilation happnes whether in Webserver or Browser(embeded with CLR) Tankful if you could explain the execution flow?

I have created simple Web serivce using C# for adding two integers and saved the file with "MyWebService.ASMX". I have copied this file to Inetpub/wwwroot IIS directory. When I call this service in browser(http://localhost/Webservices/Addservice.asmx), I am able to see the text boxes for entering the numbers and I am able to see the result in XML. I just write the file and even I didn't compile it, but I am able to use it. Probaly it's a dumb quesiton, I am new to .Net programming. Could somebody explain what is the program flow when I call the service from browser?