I am a beginner. I want to design a database(.mdb) that contains two tables (one is main table that represent a person and his base case, the other related the first talbe represent the salaries of every year),I can use this database. and how can I design these classes relate the database and use ado.net to delete 、 change、add the database . mdb-----------classes(use ado.net), can you help me?