A question about SQL connections

Hello, first time posting here :)

I'm making a CRUD with Visual Studio Forms. I already have a model with an ADO.NET Entity, and a control using that library. The thing is, a friend of mine has to make the view(I already sent him the libraries), implement the controler, and test it, and try to create a row and look at the table associated with the ADO.NET in SQL Management Studio to see if the row was inserted. The database was created in my computer and it's only in there. How can my friend connect with the database in my computer? Do I have to leave my computer on? lol