private void ChangeInXml(string selectedXPath, string destinationXPath)
{
TaskManager = (CreateTaskmanager)Session["CreateDatasetTaskmanager"];
XDocument metadataXml = (XDocument)TaskManager.Bus[CreateTaskmanager.METADATA_XML];
XmlMetadataWriter xmlMetadataWriter = new XmlMetadataWriter(XmlNodeMode.xPath);
metadataXml = xmlMetadataWriter.Change(metadataXml, selectedXPath, destinationXPath);
TaskManager.Bus[CreateTaskmanager.METADATA_XML] = metadataXml;
// locat path
string path = Path.Combine(AppConfiguration.GetModuleWorkspacePath("DCM"), "metadataTemp.Xml");
metadataXml.Save(path);
}