InitialCatalog
using System; using System.Data.SqlClient; class MainClass { public static void Main(string[] args) { string conString = @"Data Source=.\sqlexpress;" + "Database=Northwind;Integrated Security=SSPI;" + "Min Pool Size=5;Max Pool Size=15;Connection Reset=True;" + "Connection Lifetime=600;"; SqlConnectionStringBuilder sb1 = new SqlConnectionStringBuilder(conString); Console.WriteLine(" Database = " + sb1.InitialCatalog); SqlConnectionStringBuilder sb2 = new SqlConnectionStringBuilder(conString); sb2.InitialCatalog = "Northwind"; Console.WriteLine(" " + sb2.ConnectionString); } }