protected void Page_Init(object sender, EventArgs e)
 {
     if (!IsPostBack && !IsCallback)
     {
         Guid newId = Guid.NewGuid();
         ASPxHiddenField1.Add("PageID", newId);
     }
 }
 protected void Page_Init(object sender, EventArgs e)
 {
     if (!IsPostBack)
     {
         ASPxHiddenField1.Add(ASPxDockPanel1.ID, true);
         ASPxHiddenField1.Add(ASPxDockPanel2.ID, true);
         ASPxHiddenField1.Add(ASPxDockPanel3.ID, true);
     }
     RestoreDockPanelsVisibility();
 }