First I would like to point out that the Visible
property does the job of the EnableAutomaticTips property that Todd suggested. That is why, in case you do not want the RadToolTipManager to tooltipify everything on the page, until you add some IDs to its TargetControls collection, you could set its Visible
property to false initially.
However, I do not agree with you that in case you have added a RadToolTipManager to a page and its TargetControls collection is empty, the manager should not tooltipify anything. The main idea behind the manager is to be used in scenarios where many elements would require a tooltip and as you have added it to the page, it is more natural to expect something to be tooltipified. After all, you could as well add the manager dynamically, just when you need it to start tooltipifying.
However, we are open for other points of view on this topic. Should more people expect a manager with an empty TargetControls collection to do nothing, we will consider changing its behavior.
the Telerik team