How to Create access DB using C#

As said earlier, you can check existence of DB in a predefined path on application load. if it exists, you know DB is present else ask the user the path to create the database and then create the database in user's path.

Sir I am developing  a hospital management window application on vs 2010 and using ms access 2007  , I am not using sql server.
and I want to create db when install my exe on client machine ,there will be a form to select a path where I will store my db

What kind of project are you building in VS and which version? Also, share if you want to create the DB at the time of installation or you can create the DB at the very 1st run of the software.