how do i append to xml files

[abehm]

Hi,
I have a method that inserts class data into a new xml document, however I would like to append the data after the last element of an existing xml document.

here is the code I have:
if anyone can offer any help or suggestions, that would be appreciated.

    public string Insert(string XMLFile)
    {
        string XMLDirectory = this.xmlDir + this.ProjectorSN + @"\";
        string file = XMLDirectory + XMLFile;
        System.Xml.XmlTextWriter writer;
 
        if (!System.IO.Directory.Exists(XMLDirectory))
        {
            System.IO.Directory.CreateDirectory(XMLDirectory);  
        }
 
        writer = new System.Xml.XmlTextWriter(file, System.Text.Encoding.UTF8);
        writer.Formatting = System.Xml.Formatting.Indented;
        writer.WriteStartDocument();
        writer.WriteStartElement("ProductTest");
 
        writer.WriteElementString("ProductSN", this.ProjectorSN);
        writer.WriteElementString("PackageID", this.LightEngineSN);
        writer.WriteElementString("Part2", this.Lamp1);
        writer.WriteElementString("Part3", this.Lamp2);
        writer.WriteElementString("DateTime", this.DateTime);
 
        writer.WriteWhitespace(" ");
        // Write End of root element
        writer.WriteEndElement();
 
        // Write End of document
        writer.WriteEndDocument();
 
        writer.Close();
 
        return (XMLDirectory + XMLFile + " saved.");
    } 

[dorinbogdan]

Welcome to TheScripts TSDN....

Try to create a new file stream and set the access to append.

Stream xmlFile = new FileStream(@"c:\path",FileMode.Append);
XmlTextWriter textWritter = new XmlTextWriter(xmlFile, Encoding.Default);
//author: plazmo 

[abehm]

Welcome to TheScripts TSDN....

Try to create a new file stream and set the access to append.

Stream xmlFile = new FileStream(@"c:\path",FileMode.Append);
XmlTextWriter textWritter = new XmlTextWriter(xmlFile, Encoding.Default);
//author: plazmo 

okay i tried that and it worked, only it appended after the endelement of the root.
how do i append just before that?

[dorinbogdan]

At this point I suggest you to try XMLDocument, it's more flexible.
If not sure how to use, see this link.