SQL Database And Connection String in Visual studio

this is not working!!!

Can you redo this tutorial with WPF instead?

Hello sir. Are you from Oman?

Hello man, glad to discover your channel.
I am a newbie sql learner with a simple enquiry.
I was playing around visual studio and came across the term class.
When is class created inside a project and what it is all about?
Thanks a lot.

والله احسن من شرح فلاح وسعيد

كفوووزز ❤