Deleting all nodes from QuickLaunch

This is my code to delete the QuickLaunch Navigation Nodes.
I am using the SharePoint 2013.
public void 2013NodeOrders(string siteUrl, string quickLaunch)
SPSecurity.RunWithElevatedPrivileges(() =>
using (var localWeb = new SPSite(siteUrl).OpenWeb())
try
var ql = localWeb.Navigation.QuickLaunch;
int count = 0;
while (count++ < 10)
try
CleanUpAutoCreatedNodes(ql, nodeNames.ToArray());
break;
catch (Exception ex)
localWeb.Update();
catch (Exception ex)
Console.WriteLine("Error Occoured ", ex);
throw ex;
private static void CleanUpAutoCreatedNodes(SPNavigationNodeCollection ql, string[] nodenames)
foreach (SPNavigationNode globalNode in ql)
if (Array.IndexOf(nodenames, globalNode.Title) == -1)
if (globalNode.Children.Count > 0)
foreach (SPNavigationNode childNode in globalNode.Children)
childNode.Delete();
if (!globalNode.Title.Equals("Site Contents"))
globalNode.Delete();
I got the following COM Exception Error from the lines foreach
(SPNavigationNode globalNode in ql)and foreach
(SPNavigationNode childNode in globalNode.Children)
Error Message :
Cannot complete this action.
       Please try again.<nativehr>0x80004005</nativehr><nativestack></nativestack>
   Stacktrace Error
       at Microsoft.SharePoint.Library.SPRequestInternalClass.GetNavigationNodeChild(String bstrUrl, Int32 lParentId, Int32 lIndex, Int32& lNodeId, String& pbstrNodeUrl, String& pbstrName, String& pbstrNameResource,
String& pbstrDateModified, Int32& pbIsVisible, Int32& pbIsExternal, Int32& plNumChildren, Guid& pgScopeId, Int32& plParentObjectType)
       at Microsoft.SharePoint.Library.SPRequest.GetNavigationNodeChild(String bstrUrl, Int32 lParentId, Int32 lIndex, Int32& lNodeId, String& pbstrNodeUrl, String& pbstrName, String& pbstrNameResource, String&
pbstrDateModified, Int32& pbIsVisible, Int32& pbIsExternal, Int32& plNumChildren, Guid& pgScopeId, Int32& plParentObjectType)

Hi Benodh,
Have your tried to use the below sampe to iterate the collection:
for(int i = globalNode.Children.Count-1; i>-1; i--){
globalNode.Children[i].Delete();
Thanks,
Qiao Wei
TechNet Community Support

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