Server Error in '/' Application. Root element is missing. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Xml.XmlException: Root element is missing. Source Error: Line 419: tv.DataSource = XDdataSource; Line 420: Line 421: tv.DataBind(); Line 422: //tv.ExpandAll(); Line 423: //tv.CollapseAll(); Source File: d:\inetpub\webs\wigmannit\MasterPage.master.cs Line: 421 Stack Trace: [XmlException: Root element is missing.] System.Xml.XmlTextReaderImpl.Throw(Exception e) +76 System.Xml.XmlTextReaderImpl.ThrowWithoutLineInfo(String res) +61 System.Xml.XmlTextReaderImpl.ParseDocumentContent() +3991344 System.Xml.XmlTextReaderImpl.Read() +151 System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc) +48 System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace) +129 System.Xml.XmlDocument.Load(XmlReader reader) +108 System.Web.UI.WebControls.XmlDataSource.PopulateXmlDocument(XmlDocument document, CacheDependency& dataCacheDependency, CacheDependency& transformCacheDependency) +557 System.Web.UI.WebControls.XmlDataSource.GetXmlDocument() +153 System.Web.UI.WebControls.XmlHierarchicalDataSourceView.Select() +17 System.Web.UI.WebControls.TreeView.DataBindNode(TreeNode node) +125 System.Web.UI.WebControls.TreeView.PerformDataBinding() +120 System.Web.UI.WebControls.HierarchicalDataBoundControl.PerformSelect() +85 System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73 System.Web.UI.WebControls.TreeView.DataBind() +4 works_wigmann_MasterPage.setTreeViewCategorie() in d:\inetpub\webs\wigmannit\MasterPage.master.cs:421 gamma_prodotti.Page_Load(Object sender, EventArgs e) in d:\inetpub\webs\wigmannit\gamma_prodotti.aspx.cs:19 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +50 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627 Version Information: Microsoft .NET Framework Version:2.0.50727.8009; ASP.NET Version:2.0.50727.8015