I want to develop a web service that will enable me to synchronize the databases of my iphone app with a main database.
I will be using c# to write this web service. What kind of web service should I write, and how should it look like for it to be easy to call from the iphone application?
To answer the comment question: I think would prefer XML
REST webservice with JSON. It will be easier to read from iphone app. iPhone interaction with ASP.NET WebService
Also see this for tutorial http://www.codeproject.com/KB/webservices/RestWebService.aspx