Localdb: Sql Server Express
sqllocaldb info MSSQLLocalDB
Abstract SQL Server Express LocalDB is an on-demand, user-mode instance of SQL Server Express designed for developers. Unlike traditional SQL Server instances, LocalDB requires no service management, runs in the user’s context, and starts automatically when connected. This paper covers its architecture, common use cases, key limitations, and practical code examples. 1. What is LocalDB? LocalDB (introduced in SQL Server 2012) is a lightweight deployment option of SQL Server Express. It behaves like an embedded database (similar to SQLite or Microsoft Access) but uses the full sqlservr.exe engine. sql server express localdb
// Create a new database string sql = "CREATE DATABASE TestDB"; using var cmd = new SqlCommand(sql, conn); cmd.ExecuteNonQuery(); LocalDB requires no service management

