RadContextMenu doesn't have such properties TopLevelShow/HideDelay because RadContextMenu does not contains TopLevelItems It can contain only submenu header items (items with subitems) and submenu items (items without subitems).
Also RadContextMenu is opening on specific event (MouseRightButtonUp by default) so it is not visible until this event occurs.
From UX perspective most of the time RadMenu is used as a global menu visible on the main page while RadContextMenu is specific for control and provide easy access to control specific logic or behavior.
Let us know if we can help you further.
All the best,
the Telerik team
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