Using given suggested configuration: Configuration for log4net: <appender name="UdpAppender" type="log4net.Appender.UdpAppender"> <remoteAddress value="localhost" /> <remotePort value="7071" /> <layout type="log4net.Layout.XmlLayoutSchemaLog4j" /> </appender> Log is not working. Think that issues is related with log4net.Layout.XmlLayoutSchemaLog4j layout type