C# code to post xml to web service.

C# code to post xml to web service. Description: I have a class library which converts a flat file to XML and what i am missing is the part where the xml will be posted to a web service and get return if database entry was successfull. I need a template so i can see how this is done and implement this into my project. I am kind of new into c#. Project use framework 4.5