plzz help with distributed application

Hi all,
I am new to .net and ms sql. I need to develop an applicaiton which will have MS SQL central database. And users connect to this database thru network. For each application need to make a parital copy of database ( tables needed or permitted to user) on to his local machine. Purpose of making local copy is that user can access local copy when he is offline and even may make changes. And these changes needed to be updated to central database when connected later resolving confilcts if any exists with other local copies.
What will good to use for this kind of application whether SQLDMO or SQL SERVER CE or ADO.net. I am developing this in C#. Can someone PLEASE provide me some guidance like examples or links where I can more info on this kind of applcation.

Thanks in advance,
mohan.

try www.sqlmag.com for all SQL help

try that.... not sure how much it will help