Localdb Mssqllocaldb ^hot^ May 2026

public LocalDBRepository(string databaseName) { _connectionString = $@"Server=(localdb)\MSSQLLocalDB;Database={databaseName};Trusted_Connection=true;"; }

// Default LocalDB connection string "Server=(localdb)\\MSSQLLocalDB;Database=MyDatabase;Trusted_Connection=true;" // With multiple Active Result Sets (MARS) "Server=(localdb)\MSSQLLocalDB;Database=MyDatabase;Trusted_Connection=true;MultipleActiveResultSets=true;" localdb mssqllocaldb

// In Package Manager Console or CLI: // Add-Migration InitialCreate // Update-Database # Create-DevDatabase.ps1 param( [string]$InstanceName = "MSSQLLocalDB", [string]$DatabaseName = "DevDatabase" ) Check if SQL LocalDB is installed $localdbPath = "C:\Program Files\Microsoft SQL Server\130\Tools\Binn\SqlLocalDB.exe" if (-not (Test-Path $localdbPath)) { Write-Error "SQL LocalDB not found. Please install SQL Server LocalDB." exit 1 } Start LocalDB instance Write-Host "Starting LocalDB instance: $InstanceName" -ForegroundColor Green & $localdbPath start $InstanceName Get connection string $connectionString = "Server=(localdb)$InstanceName;Trusted_Connection=true;" Create database $query = "CREATE DATABASE [$DatabaseName]" Invoke-Sqlcmd -ConnectionString $connectionString -Query $query localdb mssqllocaldb