void InitializeDocument()
{
XmlDocument dom = new XmlDocument();
dom.XmlResolver = null;
dom.CreateDocumentFragment();
// declaration
XmlDeclaration declaration = dom.CreateXmlDeclaration("1.0", "UTF-8", "no");
dom.AppendChild(declaration);
// root
XmlElement svg = dom.CreateElement("svg");
dom.AppendChild(svg);
svg.SetAttribute("xmlns", "http://www.w3.org/2000/svg");
svg.SetAttribute("xmlns:xlink", "http://www.w3.org/1999/xlink");
svg.SetAttribute("version", Version);
//svg.SetAttribute("creator", ProductInfo.Title);
//svg.SetAttribute("creator_version", ProductInfo.Version);
svg.SetAttribute("width", Width.ToString());
svg.SetAttribute("height", Height.ToString());
svg.SetAttribute("viewBox", string.Format("{0} {1} {2} {3}", 0, 0, Width, Height));
// comment
var comment = dom.CreateComment("Create by Blumind, you can download it free from http://blumind.org ");
svg.AppendChild(comment);
// title
var titleElement = dom.CreateElement("title");
titleElement.InnerText = Title;
svg.AppendChild(titleElement);
// defs
Defines = dom.CreateElement("defs");
svg.AppendChild(Defines);
// style
Styles = dom.CreateElement("style");
Defines.AppendChild(Styles);
// canvas
Canvas = dom.CreateElement("g");
Canvas.SetAttribute("id", "canvas");
svg.AppendChild(Canvas);
Dom = dom;
}