Enable TCP/IP Protocol and set Login mode to Mixed mode in C#

Try to enable Microsoft SQL Server 2008 TCP/IP Protocol and set the Login mode to Mixed mode using C# without involve registry. Come across information below http://stackoverflow.com/questions/2266697/changing-sql-server-settings-programmatically

The information is really helpful but when try it in SQL Server 2008 using the C# source code given, it's not working very well. Then try to do some testing and finally it's work. I've added a line srv.Settings.Alter();



private static bool SetServerProperties()
    {
        #region standardize Connection String
        string tempCatalog = "master";
        string temp = @"Data Source=" + dataSource + ";Initial Catalog=" + tempCatalog + ";Integrated Security=True;MultipleActiveResultSets=True";
        #endregion

        SqlConnection sqlconnection = new SqlConnection(temp);
        SqlCommand cmd = new SqlCommand("select @@ServerName", sqlconnection);
        sqlconnection.Open();
        string serverName = "";
        try
        {
            SqlDataReader dr = cmd.ExecuteReader();
            while (dr.Read())
                serverName = dr[0].ToString();
        }
        catch
        {
            MessageBox.Show("Failed to Set SQL Server Properties for remote connections.");
        }

        Server srv = new Server(serverName);
        srv.ConnectionContext.Connect();
        srv.Settings.LoginMode = ServerLoginMode.Mixed;
srv.Settings.Alter(); 

        ManagedComputer mc = new ManagedComputer();

        try
        {
            Service Mysvc = mc.Services["MSSQL$" + serverName.Split('\\')[1]];

            if (Mysvc.ServiceState == ServiceState.Running)
            {
                Mysvc.Stop();
                Mysvc.Alter();

                while (!(string.Format("{0}", Mysvc.ServiceState) == "Stopped"))
                {
                    Mysvc.Refresh();
                }
            }

            ServerProtocol srvprcl = mc.ServerInstances[0].ServerProtocols[2];
            srvprcl.IsEnabled = true;
            srvprcl.Alter();


            Mysvc.Start();
            Mysvc.Alter();

            while (!(string.Format("{0}", Mysvc.ServiceState) == "Running"))
            {
                Mysvc.Refresh();
            }
            return true;
        }
        catch
        {
            MessageBox.Show("TCP/IP connectin could not be enabled.");
            return false;
        }
    }


Thanks to http://stackoverflow.com/users/1635051/reza-ameri