protected override void FormatXml()

in src/log4net/Layout/XmlLayout.cs [217:334]
101 lines of code
17 McCabe index (conditional complexity)

		protected override void FormatXml(XmlWriter writer, LoggingEvent loggingEvent)
		{
			#if NETSTANDARD
			writer.WriteStartElement(m_prefix, ELM_EVENT, m_prefix);
			// writer.WriteAttributeString("xmlns", "log4net", null, "http://logging.apache.org/log4net/schemas/log4net-events-1.2");
			#else
			writer.WriteStartElement(m_elmEvent);
			#endif
			writer.WriteAttributeString(ATTR_LOGGER, loggingEvent.LoggerName);

#if NET_2_0 || NETCF_2_0 || MONO_2_0 || NETSTANDARD
			writer.WriteAttributeString(ATTR_TIMESTAMP, XmlConvert.ToString(loggingEvent.TimeStamp, XmlDateTimeSerializationMode.Local));
#else
			writer.WriteAttributeString(ATTR_TIMESTAMP, XmlConvert.ToString(loggingEvent.TimeStamp));
#endif

			writer.WriteAttributeString(ATTR_LEVEL, loggingEvent.Level.DisplayName);
			writer.WriteAttributeString(ATTR_THREAD, loggingEvent.ThreadName);

			if (loggingEvent.Domain != null && loggingEvent.Domain.Length > 0)
			{
				writer.WriteAttributeString(ATTR_DOMAIN, loggingEvent.Domain);
			}
			if (loggingEvent.Identity != null && loggingEvent.Identity.Length > 0)
			{
				writer.WriteAttributeString(ATTR_IDENTITY, loggingEvent.Identity);
			}
			if (loggingEvent.UserName != null && loggingEvent.UserName.Length > 0)
			{
				writer.WriteAttributeString(ATTR_USERNAME, loggingEvent.UserName);
			}
    
			// Append the message text
			#if NETSTANDARD
			writer.WriteStartElement(m_prefix, ELM_MESSAGE, m_prefix);
			#else
			writer.WriteStartElement(m_elmMessage);
			#endif
			if (!this.Base64EncodeMessage)
			{
				Transform.WriteEscapedXmlString(writer, loggingEvent.RenderedMessage, this.InvalidCharReplacement);
			}
			else
			{
				byte[] messageBytes = Encoding.UTF8.GetBytes(loggingEvent.RenderedMessage);
				string base64Message = Convert.ToBase64String(messageBytes, 0, messageBytes.Length);
				Transform.WriteEscapedXmlString(writer, base64Message,this.InvalidCharReplacement);
			}
			writer.WriteEndElement();

			PropertiesDictionary properties = loggingEvent.GetProperties();

			// Append the properties text
			if (properties.Count > 0)
			{
				#if NETSTANDARD
				writer.WriteStartElement(m_prefix, ELM_PROPERTIES, m_prefix);
				#else
				writer.WriteStartElement(m_elmProperties);
				#endif
				foreach(System.Collections.DictionaryEntry entry in properties)
				{
					#if NETSTANDARD
					writer.WriteStartElement(m_prefix, ELM_DATA, m_prefix);
					#else
					writer.WriteStartElement(m_elmData);
					#endif
					writer.WriteAttributeString(ATTR_NAME, Transform.MaskXmlInvalidCharacters((string)entry.Key,this.InvalidCharReplacement));

					// Use an ObjectRenderer to convert the object to a string
					string valueStr =null;
					if (!this.Base64EncodeProperties)
					{
						valueStr = Transform.MaskXmlInvalidCharacters(loggingEvent.Repository.RendererMap.FindAndRender(entry.Value),this.InvalidCharReplacement);
					}
					else
					{
						byte[] propertyValueBytes = Encoding.UTF8.GetBytes(loggingEvent.Repository.RendererMap.FindAndRender(entry.Value));
						valueStr = Convert.ToBase64String(propertyValueBytes, 0, propertyValueBytes.Length);
					}
					writer.WriteAttributeString(ATTR_VALUE, valueStr);

					writer.WriteEndElement();
				}
				writer.WriteEndElement();
			}

			string exceptionStr = loggingEvent.GetExceptionString();
			if (exceptionStr != null && exceptionStr.Length > 0)
			{
				// Append the stack trace line
				#if NETSTANDARD
				writer.WriteStartElement(m_prefix, ELM_EXCEPTION, m_prefix);
				#else
				writer.WriteStartElement(m_elmException);
				#endif
				Transform.WriteEscapedXmlString(writer, exceptionStr,this.InvalidCharReplacement);
				writer.WriteEndElement();
			}

			if (LocationInfo)
			{ 
				LocationInfo locationInfo = loggingEvent.LocationInformation;

				#if NETSTANDARD
				writer.WriteStartElement(m_prefix, ELM_LOCATION, m_prefix);
				#else
				writer.WriteStartElement(m_elmLocation);
				#endif
				writer.WriteAttributeString(ATTR_CLASS, locationInfo.ClassName);
				writer.WriteAttributeString(ATTR_METHOD, locationInfo.MethodName);
				writer.WriteAttributeString(ATTR_FILE, locationInfo.FileName);
				writer.WriteAttributeString(ATTR_LINE, locationInfo.LineNumber);
				writer.WriteEndElement();
			}

			writer.WriteEndElement();
		}