Index: Core/Gui/src/Core.Gui/Forms/Log/MessageWindowLogAppender.cs
===================================================================
diff -u -r9e9976818f1b446948c3bf815cafe2e023f98ac1 -r36a0249ede8dc35feb57280f69a860bbd626c63c
--- Core/Gui/src/Core.Gui/Forms/Log/MessageWindowLogAppender.cs	(.../MessageWindowLogAppender.cs)	(revision 9e9976818f1b446948c3bf815cafe2e023f98ac1)
+++ Core/Gui/src/Core.Gui/Forms/Log/MessageWindowLogAppender.cs	(.../MessageWindowLogAppender.cs)	(revision 36a0249ede8dc35feb57280f69a860bbd626c63c)
@@ -22,7 +22,6 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
-using Core.Common.Util.Reflection;
 using Core.Gui.Properties;
 using log4net.Appender;
 using log4net.Core;
@@ -115,8 +114,8 @@
             var stringFormat = loggingEvent.MessageObject as SystemStringFormat;
             if (stringFormat != null)
             {
-                var format = TypeUtils.GetField<string>(stringFormat, "m_format");
-                var args = TypeUtils.GetField<object[]>(stringFormat, "m_args");
+                string format = stringFormat.Format;
+                object[] args = stringFormat.Args;
                 message = GetLocalizedMessage(format, args);
             }