' Get a custom section.
Shared Sub GetSection() 
    Try

        Dim customSection As CustomSection

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

        customSection = _
        config.GetSection("CustomSection")
        Console.WriteLine( _
        "Section name: {0}", _
        customSection.SectionInformation.Name)

    Catch err As ConfigurationErrorsException
        Console.WriteLine(err.ToString())
    End Try

End Sub 'GetSection

// Get a custom section.
static void GetSection()
{
    try
    {

        CustomSection customSection;

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

        customSection = 
            config.GetSection("CustomSection") as CustomSection;

        Console.WriteLine("Section name: {0}", 
            customSection.SectionInformation.Name);

    }
    catch (ConfigurationErrorsException err)
    {
        Console.WriteLine(err.ToString());
    }

}