Числовые значения уровней Log4Net

Вот выдержка из класса Level (декомпилированная с . net reflector)

  public static readonly Level Alert = new Level(0x186a0, "ALERT");
    public static readonly Level All = new Level(-2147483648, "ALL");
    public static readonly Level Critical = new Level(0x15f90, "CRITICAL");
    public static readonly Level Debug = new Level(0x7530, "DEBUG");
    public static readonly Level Emergency = new Level(0x1d4c0, "EMERGENCY");
    public static readonly Level Error = new Level(0x11170, "ERROR");
    public static readonly Level Fatal = new Level(0x1adb0, "FATAL");
    public static readonly Level Fine = new Level(0x7530, "FINE");
    public static readonly Level Finer = new Level(0x4e20, "FINER");
    public static readonly Level Finest = new Level(0x2710, "FINEST");
    public static readonly Level Info = new Level(0x9c40, "INFO");
    private readonly string m_levelDisplayName;
    private readonly string m_levelName;
    private readonly int m_levelValue;
    public static readonly Level Notice = new Level(0xc350, "NOTICE");
    public static readonly Level Off = new Level(0x7fffffff, "OFF");
    public static readonly Level Severe = new Level(0x13880, "SEVERE");
    public static readonly Level Trace = new Level(0x4e20, "TRACE");
    public static readonly Level Verbose = new Level(0x2710, "VERBOSE");
    public static readonly Level Warn = new Level(0xea60, "WARN");