about SQL Server Express

i am current developing a project. in visual studio i can create a database file. if i use the database file in my app. does it require SQL Server Express install on a user pc in order to run my app?

thanks

If you can create a DB within Visual Studio, then you already have the SQL Express installed on your PC.|||

i meant when people using my app, will they have to install SQL Server Express?

thanks

|||If this is a web application, then only the web server requires SQL Express. Clients only require the browser. On the other hand, if you're building a Windows application that run locally on each PC, then yes, you do need local installation of SQL Express.