Hi,
as descriped on their github page, it's a server plugin for ASP.NET using MVC pattern (within your application). Do you really know what MVC is/does?
Anyway, it does the following (copied from github page):
A .NET 4 framework library for the Rhoconnect App Integration Server.
Using rhoconnect.NET, your ASP.NET MVC3 application's data will transparently synchronize with a mobile application built on the Rhodes framework, or any of the available Rhoconnect clients.
However, there are well documented examples at Github:
https://github.com/rhomobile/rhoconnect.NET[
^]
Regards