private void ConfigureRulesFromElement(XmlElement element)
        {
            if (element == null)
                return;
            foreach (XmlElement ruleElement in element.GetElementsByTagName("logger"))
            {
                AppenderRule rule = new AppenderRule();
                string namePattern = ruleElement.GetAttribute("name");
                string appendTo = ruleElement.GetAttribute("appendTo");

                rule.LoggerNamePattern = namePattern;
                foreach (string appenderName in appendTo.Split(','))
                {
                    rule.AppenderNames.Add(appenderName.Trim());
                }
                rule.Final = false;

                if (ruleElement.HasAttribute("final"))
                {
                    rule.Final = true;
                }

                if (ruleElement.HasAttribute("level"))
                {
                    LogLevel level = LogLevelFromString(ruleElement.GetAttribute("level"));
                    rule.EnableLoggingForLevel(level);
                }
                else if (ruleElement.HasAttribute("levels"))
                {
                    string levelsString = ruleElement.GetAttribute("levels");
                    levelsString = CleanWhitespace(levelsString);

                    string[] tokens = levelsString.Split(',');
                    foreach (string s in tokens)
                    {
                        LogLevel level = LogLevelFromString(s);
                        rule.EnableLoggingForLevel(level);
                    }
                }
                else
                {
                    int minLevel = 0;
                    int maxLevel = (int)LogLevel.MaxLevel;

                    if (ruleElement.HasAttribute("minlevel"))
                    {
                        minLevel = (int)LogLevelFromString(ruleElement.GetAttribute("minlevel"));
                    }

                    if (ruleElement.HasAttribute("maxlevel"))
                    {
                        maxLevel = (int)LogLevelFromString(ruleElement.GetAttribute("maxlevel"));
                    }

                    for (int i = minLevel; i <= maxLevel; ++i)
                    {
                        rule.EnableLoggingForLevel((LogLevel)i);
                    }
                }

                AppenderRules.Add(rule);
            }
        }
 public void AddAppenderRule(AppenderRule rule)
 {
     _appenderRules.Add(rule);
 }