When chart data is transferred from one page to another, IDs are created for the Session or Cache variables or for a filename in order to render a chart image. This property determines whether a unique ID is created each time the chart image is accessed (i.e. when the chart image is accessed by a single user), or if the same ID is to be used for the duration of the application life (i.e. when the identical chart image is accessed by multiple users or accessed repeatedly by a single user).

Note: The ImageIdGeneration property has no effect with the ImageRenderMethodEnum.File or ImageRenderMethodEnum.BinaryWrite.