How to go about making a database that can be accessed by multiple computers?

Question

Hi all,

So I want to make a database that will eventually be able to be accessed by multiple computers. Would it be better to make a database in a network or shared folder (I don't even know if this is possible) or would it be better for me to make an online database.

If the answer is an online database I need a little information on how to go about making a c# program in Visual Studio 2010 that would be able to access and edit this database. I'm familiar with creating a database in Visual Studio 2010, but I have no clue how to make a program that can access the database online.

Any and all help is appreciated.