Sharepoint 2013 如何使用CSOM在sharepoint online 2013中删除导航节点

我想从导航sharepoint online 2013中删除导航节点（而不是禁用QuickLaunch）

ClientContext context = ClaimClientContext.GetAuthenticatedContext(targetURL, 600, 600);
                NavigationNodeCollection collNavNode = context.Web.Navigation.QuickLaunch;
                context.Load(collNavNode);
                foreach (SP.NavigationNode node in collNavNode)
                {
                    node.DeleteObject();
                }

                context.ExecuteQuery();

---

它不工作。

如何使用SharePoint CSOM从QuickLaunch删除所有节点：

public static void ClearQuickLaunch(string url, ICredentials credentials)
{
    using (var context = new ClientContext(url))
    {
        context.Credentials = credentials;

        NavigationNodeCollection qlNodes = context.Web.Navigation.QuickLaunch;
        context.Load(qlNodes);
        context.ExecuteQuery();

        qlNodes.ToList().ForEach(node => node.DeleteObject());
        context.ExecuteQuery();
    }
}