How to store and access the database locally in application?

Question

Hello,

 

I made an application(used : C# win form, sql server 2008 r2). 

 

Now when I goes for the marketing and want to give the demo version to client I have to install the sql server also.

 

Everytime installing the Sql sever is an headach to me, it take lots of time.

 

Can any one give any solution how can I store database in my application only?

 

Thank you to all.