log4net in trace level

Question

how to add a Trace level in log4net

 as i tried below code not working

public static class ILogExtentions { public static void Trace(this ILog log, string message, Exception exception) {         log.Logger.Log(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType,              log4net.Core.Level.Trace, message, exception); } public static void Trace(this ILog log, string message) {         log.Trace(message, null); } public static void Verbose(this ILog log, string message, Exception exception) {         log.Logger.Log(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType,              log4net.Core.Level.Verbose, message, exception); } public static void Verbose(this ILog log, string message) {         log.Verbose(message, null); }  }