Tooltips and Pop-Ups
Silverlight has a flexible model for tooltips (those infamous yellow boxes that pop up when you hover over something interesting). Because tooltips in Silverlight are content controls, you can place virtually anything inside a tooltip.
Tooltips are represented by the ToolTip content control. However, you don't add the ToolTip element to your markup directly. Instead, you use the ToolTipService to configure a tooltip for an existing element, by setting attached properties. Silverlight will then create the ToolTip automatically and display it when it's needed.
The simplest example is a text-only tooltip. You can create a text-only tooltip by setting the ToolTipService.ToolTip property on another element, as shown here:
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