Sometimes you need to connect to an instance of SQL LocalDB and all you have to go on is the ConnectionString that looks like this:

Server=(localdb)\mssqllocaldb;Database=aspnet5...

Trying to use SQL Server Management Studio to connect to (localdb)\mssqllocaldb would most likely fail. Instead, run the command:

sqllocaldb info

Output resembles:

MSSQLLocalDB
v11.0

Pick the corresponding instance and type in:

sqllocaldb info mssqllocaldb

Output resembles:

Name:               mssqllocaldb
Version:            12.0.2000.8
Shared name:
Owner:              PCNAMEuser
Auto-create:        Yes
State:              Running
Last start time:    20-Nov-15 1:05:43 PM
Instance pipe name: np:\\.\pipe\LOCALDB#FE1DF363\tsql\query

Connect using SQL Management Studio to the named pipe np:\\.\pipe\LOCALDB#FE1DF363\tsql\query