protected virtual void OnNewFolder(object sender, EventArgs args) { var srvNode = new ServiceFolderNode(); var service = serviceFolder.CreateServiceFolder(); service.Name = "NewFolder" + DateTime.Now.ToString("yyyy-MM-dd hh:mm:sss"); srvNode.ServiceFolder = service; this.serviceFolder.ServiceFolders.AddChild(service); this.Children.Add(srvNode); this.TreeNode.Expand(); }