' Show how to set LockItem 
    ' It adds a new UrlConfigElement to  
    ' the collection. 
    Shared Sub LockItem()
        Dim name As String = "Contoso" 
        Dim url As String = "http://www.contoso.com/" 
        Dim port As Integer = 8080

        Try 
            ' Get the current configuration file. 
            Dim config _
            As System.Configuration.Configuration = _
            ConfigurationManager.OpenExeConfiguration( _
            ConfigurationUserLevel.None)

            ' Get the MyUrls section. 
            Dim myUrls As UrlsSection = _
            config.Sections("MyUrls")


            ' Create the new  element. 
            Dim newElement _
            As New UrlConfigElement(name, url, port)

            ' Set its lock.
            newElement.LockItem = True 

            ' Save the new element to the  
            ' configuration file. 
            If Not myUrls.ElementInformation.IsLocked Then

                myUrls.Urls.Add(newElement)

                config.Save(ConfigurationSaveMode.Full)

                ' This is used to obsolete the cached  
                ' section and read the updared version  
                ' from the configuration file.
                ConfigurationManager.RefreshSection("MyUrls")
            Else
                Console.WriteLine("Section was locked, could not update.")
            End If 

        Catch e As ConfigurationErrorsException
            Console.WriteLine("[LockItem: {0}]", _
            e.ToString())
        End Try 

    End Sub 'LockItem

// Show how to set LockItem 
// It adds a new UrlConfigElement to  
// the collection. 
static void LockItem()
{
    string name = "Contoso";
    string url = "http://www.contoso.com/";
    int port = 8080;

    try
    {
        // Get the current configuration file.
        System.Configuration.Configuration config =
            ConfigurationManager.OpenExeConfiguration(
            ConfigurationUserLevel.None);

        // Get the MyUrls section.
        UrlsSection myUrls =
           config.Sections["MyUrls"] as UrlsSection;


        // Create the new  element.
        UrlConfigElement newElement =
            new UrlConfigElement(name, url, port);

        // Set its lock.
        newElement.LockItem = true;

        // Save the new element to the  
        // configuration file. 
        if (!myUrls.ElementInformation.IsLocked)
        {

            myUrls.Urls.Add(newElement);

            config.Save(ConfigurationSaveMode.Full);

            // This is used to obsolete the cached  
            // section and read the updated  
            // bersion from the configuration file.
            ConfigurationManager.RefreshSection("MyUrls");
        }
        else
            Console.WriteLine(
                "Section was locked, could not update.");

    }
    catch (ConfigurationErrorsException e)
    {
        Console.WriteLine("[LockItem: {0}]",
            e.ToString());
    }

}