System.Xml.Tests.XsltEvents.EventsTests C# (CSharp) Method

        public void EventsTests(object param0, object param1, object param2, object param3)
        {
            XslCompiledTransform xslt = new XslCompiledTransform();
            XsltArgumentList argList = new XsltArgumentList();

            //Collect the test data
            string SourceFile = FullFilePath("message.xml");
            string XslFile = FullFilePath(param0.ToString());
            string XslMessageTerminate = param1.ToString();
            string EventHandlerExists = param2.ToString();
            string Baseline = "baseline" + Path.DirectorySeparatorChar + param3.ToString();
            OutFile = "Message.txt";

            //Check if the EventHandler Exists
            if (EventHandlerExists == "yes")
                argList.XsltMessageEncountered += new XsltMessageEncounteredEventHandler(argList_XsltMessageEncountered);

            EventRaised = false;

            //Delete the output file if it exists
            if (File.Exists(OutFile))
                File.Delete(OutFile);

            //Create a navigator over the source document
            XPathDocument doc = new XPathDocument(SourceFile);
            XPathNavigator nav = doc.CreateNavigator();

            //Create a temporary output stream
            StreamWriter sw = new StreamWriter(new MemoryStream());
            XmlWriter xw = new XmlTextWriter(sw);

            //Compile the Stylesheet
            _output.WriteLine(XslFile);
            xslt.Load(XslFile);

            if (XslMessageTerminate == "yes")
            {
                try
                {
                    xslt.Transform(nav, argList, xw);
                    _output.WriteLine("**** XsltException NOT Raised ****");
                    Assert.True(false);
                }
                catch (XsltException e)
                {
                    _output.WriteLine("----  {0} Raised ----", e.ToString());
                    if (EventHandlerExists == "no")
                        SerializeMessage(OutFile, e.Message);
                }
            }
            else
            {
                xslt.Transform(nav, argList, xw);
            }

            //Verify if the Event is raised and the result is verified
            if (EventRaised)
            {
                VerifyResult(Baseline, OutFile);
                return;
            }
            else
            {
                if (EventHandlerExists == "yes")
                {
                    _output.WriteLine("**** OnMessageEvent NOT Raised ****");
                    Assert.True(false);
                }
                else
                {
                    return;
                }
            }
        }
    }