OleDbConnection: State
using System; using System.Data; using System.Data.SqlClient; using System.Data.OleDb; class MainClass { public static void Main() { using (OleDbConnection con = new OleDbConnection()) { con.ConnectionString = "Provider=SQLOLEDB;" + @"Data Source=.\sqlexpress;" + "Initial Catalog=Northwind;" + "Integrated Security=SSPI"; con.Open(); if (con.State == ConnectionState.Open) { Console.WriteLine(" Connection State = " + con.State); } else { Console.WriteLine("OleDbConnection failed to open."); Console.WriteLine(" Connection State = " + con.State); } } } }