Online-Offline survey System

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ASP.NET

Thank you for your time.

I like to develop a survey system with following features

0. The main system is hosted in web server
1. There are registered members
2. Members can participate in survey via internet.
3. When the members want to participate survey the will log In

good so far but........

4. Now a light weighted system will be installed automatically in their Laptop/PC only for once.

5. The purpose of this system is
5.1 logIn to this system
5.2 Download all survey question in PC,
5.3 Go Offline / Disconnected / Internet is not available.
5.4 Take survey and store the result.
5.5 Whenever the the internet connection is available. Connect and submit his survey.
5.6 Next time s/he will only just log in select survey set. Participate whenever likes.

Could any please help me how to develop this system?
What this architecture called?
Where can i find more information?

I want to develop it in C#.net 2008

Thank you