[ADO.NET] Asynchronous Processing

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "Server=VAKHO-PC; Database=TestDB; Integrated Security=true; Asynchronous Processing=true;";

            SqlConnection con = new SqlConnection(connectionString);

            string sqlCommand = "UPDATE dbo.Users SET salary=salary+10; " + "WAITFOR DELAY '0:0:10'" + " UPDATE dbo.Users SET salary=salary+10";

            SqlCommand updateCommand = new SqlCommand(sqlCommand, con);

            con.Open();
            Console.WriteLine("Connection Status: " + con.State.ToString());

            IAsyncResult result = updateCommand.BeginExecuteNonQuery();

            while (!result.IsCompleted)
            {
                Console.WriteLine(DateTime.Now.ToLongTimeString());
                System.Threading.Thread.Sleep(2000);
            }

            updateCommand.EndExecuteNonQuery(result);

            con.Close();

            Console.WriteLine("The End");
            Console.ReadKey();
        }
    }
}