Till now, whenever I wanted to create a local sql database in visual studio, I'd fire it up, run the default page and try to log in. This would create it automatically. I just downloaded Community version 2015 and it is not creating a database, though it did create a connection string in the web.config
2 Answers
You need install LocalDB 64BIT\SqlLocalDB.msi from Microsoft's page. Here's a tutorial about the localdb connection
Open CMD and RUN this comand sqllocaldb info you need see (v12.0) if not, run this command:
sqllocaldb create "v12.0"