title: When to update the external database when using data adapters? To make bulk updates
body: <p>Can anyone clarify when to call the <code>DataAdapter.Update(datatable)</code> command? So that we can make bulk updates in the external database. Since, in application where one can update delete and add users if we perform an update in the external database after every action i.e add, delete or update then there would be no use of using data adapters. So, where and when do we call the update command? Since, we have no idea when the application user will quit.
  Do we write it in the destruct-or? Does C# have destructor? </p>