 The AnnotationsSource property specifies a collection, used to generate the annotations of the RadTimeline instance. When AnnotationsSource property is set, the Annotations collection is read-only.

  - AnnotationStartPath property - The path to the StartDate source property.
  - AnnotationDurationPath property - The path to the Duration source property.
  - AnnotationZIndexPath property property - The path to the ZIndex source property.
  - AnnotationContentPath property - The path to the Content source property.
  - AnnotationContentTemplate property - A DataTemplate that defines the visualization of the content of the generated timeline annotations. The default is null. 