Gets or sets the tooltip for the title.
Assembly: System.Web.DataVisualization (in System.Web.DataVisualization.dll)
If you set the property, a client-side image map will automatically be created. A map area will also be created with its Title attribute set to the specified tooltip string. The map area will use the dimensions that correspond to the title.
Setting this property will have no effect if the IsMapEnabled property is set to false. The default value is true.
Important To create an image map in this manner, the RenderType property of the Chart object must be set to ImageTag. It is possible to create an image map when using binary streaming, but another technique must be used.