Thanks Abhijit Jana for the useful link, I will have a look! :)

Thanks Baran, but is there any related articles or sample codes that I can refer to? :rose:

Hi all, I am new in .NET, I wrote a simple web service using VS 2003 where it will return some data of my customers. I need to invoke this web service with large amount of data now(e.g.3000rows record). I was thinking of how can I process this in bulk with better perfomance rather than calling the service in real time? I have the input file which is in CSV format. I will be glad to hear any of the suggestions. Thanks! :)