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How to check for existing node while writing in XML file ?

Posted By:      Posted Date: May 22, 2011    Points: 0   Category :ASP.Net


         I have to add a node each time the compiler passes through the following code :

         string XMLFilePath = System.Web.Hosting.HostingEnvironment.MapPath("~/Log/log.xml").ToString();

            if (File.Exists(XMLFilePath))
                XmlTextWriter xmlWriter = new XmlTextWriter(XMLFilePath, System.Text.Encoding.UTF8);
                xmlWriter.Formatting = Formatting.Indented;
                xmlWriter.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
                xmlWriter.WriteElementString("error", "No file input");

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