Thank you for contacting us.
I have tried to reproduce the problem on my end, but with no success. I have 1000 categories in the list, but I haven't associated them with any items, so can you tell me if you have associated yours? Also can you provide me with your server's specs?
For deleting a category you can use this code:
TaxonomyManager manager = TaxonomyManager.GetManager();
HierarchicalTaxon Taxon = manager.GetTaxa<HierarchicalTaxon>().Where(t => t.Title ==
I hope this helps. Please let me know if you have any further questions.
the Telerik team
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