Gets the string representation for the System.Web.UI.WebControls.RectangleHotSpot object's shape.
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The RectangleHotSpot.MarkupName property is used internally by ASP.NET to get the string representation for the System.Web.UI.WebControls.RectangleHotSpot object's shape. This property always returns the string "rect". You cannot access this property directly from your application's code.