The title of this question might be a bit clumsily phrased, but here\'s the situation:
I have a .NET web project deployed on my server.
Store on the server/web the most recent version of the project that is online. eg: in a version.txt the value "2.1.0", or query the database if you have access too.
Your application running on clients, will periodically read the contents of the version.txt file, then compared against the inbuilt(self) version number.
Does this help?