ADO Net C# Tutorial

using System;
using System.Data.SqlClient;
    class Program
    {
        static void Main(string[] args)
        {
            string sqlConnectString = @"Data Source=(local)\SQLExpress;Integrated security=SSPI;Initial Catalog=master;";
            using (SqlConnection connection = new SqlConnection(sqlConnectString))
            {
                connection.Open(  );
                Console.WriteLine(connection.State);
                Console.WriteLine(connection.DataSource);
                Console.WriteLine(connection.ServerVersion);
            }
        }
    }