public void EnsureXmlReportIsSaved()
 {
     lock (testResultLock)
     {
         if (xmlReportSaved == false && testResults.Any() == true)
         {
             XDocument doc = XmlManager.CreateTestReport(this.TestResults);
             doc.Save("report.xml", SaveOptions.None);
             xmlReportSaved = true;
         }
     }
 }