Sync database from desktop system to remote server and vice versa?

I make a application, which has to interfaces. one is desktop and other is web application. both have their own databases (which are same is structure).

I want to sync the database from desktop to remote server and also from remote server to desktop but i have no idea that how it does.

I use the MYSql database. and my desktop application is in .NET

NOTE: There are more than one destop systems who update their 开发者_高级运维databases and also sync databases.

you can write an application that delete the common data between your db and destination db from destination db, after that copy all of your data from db to your destination db. by this work you can have a updated data in every time that you do this work.