private void copyToClipboard()
{
if (selectionService.PrimarySelection != null)
{
MathExpViewer mv = selectionService.PrimarySelection as MathExpViewer;
if (mv != null)
{
MathExpGroup mg = new MathExpGroup();
MathExpItem mi = mv.ExportMathItem(mg);
XmlDocument doc = new XmlDocument();
XmlNode node = doc.CreateElement("MathExpression");
doc.AppendChild(node);
mi.SaveToXmlNode(_writer, node);
Clipboard.SetData("MathItem", doc.OuterXml);
enablePaste();
}
}
}
