TableAdapter don't store any rows, it just provide communication between your application and a database. try to read this article to get more info:http://msdn.microsoft.com/en-us/library/bz9tthwx(VS.80).aspx[^] The Datatable represents one table of data, so you should depend on the datatable to use the find or select methods.
Like what you do if you can't do what you like :)