public static void Warn( 
   string message,
   Exception ex
)

Parameters

message

The message to write to the log

ex

The exception to log

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

Logger Class
Logger Members
Overload List