I want to use any free SMS service to send the SMS (free) from my application. I am developing the application in C# + asp.net. How can I do the code for that.
Most mobile/cell providers provide a free email to SMS gateway so if you know the phone number's service provider and you're only catering to a select market (e.g. UK only) then that may be an option.
See SMS from web application for more details or try https://stackoverflow.com/questions/tagged/c%23%20sms