Index: ExceptionPatternConverter.cs
===================================================================
--- ExceptionPatternConverter.cs	(revision 426364)
+++ ExceptionPatternConverter.cs	(working copy)
@@ -21,6 +21,7 @@
 using System.IO;
 
 using log4net.Core;
+using log4net.Util;
 
 namespace log4net.Layout.Pattern
 {
@@ -64,7 +65,8 @@
 		/// trailing newline.
 		/// </para>
 		/// <para>
-		/// If there is no exception then nothing will be output
+		/// If there is no exception or the exception property specified
+		/// by the Option value does not exist then nothing will be output
 		/// and no trailing newline will be appended.
 		/// It is typical to put a newline before the exception
 		/// and to have the exception as the last data in the pattern.
@@ -72,11 +74,45 @@
 		/// </remarks>
 		override protected void Convert(TextWriter writer, LoggingEvent loggingEvent)
 		{
-			string exceptionString = loggingEvent.GetExceptionString();
-			if (exceptionString != null && exceptionString.Length > 0) 
+			if (loggingEvent.ExceptionObject != null && Option != null)
 			{
-				writer.WriteLine(exceptionString);
+				if (0 == String.Compare(Option, "Message", true))
+				{
+					writer.Write(loggingEvent.ExceptionObject.Message);
+				}
+				else if (0 == String.Compare(Option, "Source", true))
+				{
+					writer.Write(loggingEvent.ExceptionObject.Source);
+				}
+				else if (0 == String.Compare(Option, "StackTrace", true))
+				{
+					writer.Write(loggingEvent.ExceptionObject.StackTrace);
+				}
+				else if (0 == String.Compare(Option, "TargetSite", true))
+				{
+					WriteObject(writer, loggingEvent.Repository, loggingEvent.ExceptionObject.TargetSite);
+				}
+				else if (0 == String.Compare(Option, "HelpLink", true))
+				{
+					writer.Write(loggingEvent.ExceptionObject.HelpLink);
+				}
+				else
+				{
+					// do not output SystemInfo.NotAvailableText
+				}
 			}
+			else
+			{
+				string exceptionString = loggingEvent.GetExceptionString();
+				if (exceptionString != null && exceptionString.Length > 0) 
+				{
+					writer.WriteLine(exceptionString);
+				}
+				else
+				{
+					// do not output SystemInfo.NotAvailableText
+				}
+			}
 		}
 	}
 }