C# with Microsoft Access database

Question

Please i would like to know howto join two tables or more into one form and also i want the update, add or delete form to be updated in the database. I also want to access all the tables using a single  primary key. Im doing a project about a human resource time sheet which calculates time, date, total  upto date cost.I have ten tables in my database. I would be really glad if someone could urgently guide me on how to join these tables. You can send the reply or result to [email protected]