Added more utility methods
Added more utility methods


git-svn-id: 223c0ba935819ffdcafdc68147dc609b4e469b1e@312067 13f79535-47bb-0310-9956-ffa450edef68

amtkmrsmn/log4net,modulexcite/log4net,Dagwaging/log4net,modulexcite/log4net,StevenJiang2015/log4net,StevenJiang2015/log4net,modulexcite/log4net,drunkirishcoder/monotouch-log4net,Dagwaging/log4net,drunkirishcoder/monotouch-log4net,amtkmrsmn/log4net,harold4/log4net,drunkirishcoder/monotouch-log4net,amtkmrsmn/log4net,harold4/log4net,drunkirishcoder/monotouch-log4net,StevenJiang2015/log4net,harold4/log4net,Dagwaging/log4net