System.Diagnostics.XmlWriterTraceListener.TraceData C# (CSharp) Method

        public override void TraceData(TraceEventCache eventCache, String source, TraceEventType eventType, int id, params object[] data) {
            if (Filter != null && !Filter.ShouldTrace(eventCache, source, eventType, id, null, null, null, data)) 
                return;

            WriteHeader(source, eventType, id, eventCache);
            InternalWrite("<TraceData>");
            if (data != null) {
                for (int i=0; i<data.Length; i++) {
                    InternalWrite("<DataItem>");
                    if (data[i] != null)
                        WriteData(data[i]);
                    InternalWrite("</DataItem>");
                }
            }
            InternalWrite("</TraceData>");

            WriteFooter(eventCache);
        }

		public void XPathNavigatorAsData ()
		{
			// While XmlReader, XmlDocument and XDocument are not supported as direct xml content (i.e. to not get escaped), XPathNavigator is.
			var sw = new StringWriter ();
			var xl = new XmlWriterTraceListener (sw);
			var doc = new XmlDocument ();
			string xml = "<root><child xmlns=\"urn:foo\">text</child></root>";
			doc.LoadXml (xml);
			xl.TraceData (null, "my source", TraceEventType.Information, 1, doc.CreateNavigator (), doc.CreateNavigator ());
			// Note that it does not result in "<root xmlns=''>...".
			// See XmlWriterTraceListener.TraceCore() for details.
			Assert.IsTrue (sw.ToString ().IndexOf (xml) > 0, "#1");
			Assert.IsTrue (sw.ToString ().IndexOf ("</DataItem><DataItem>") > 0, "#2");
		}