Binding mode to control how a binding is updated.
To let the data binding system know that the value in the UI changed, use VisualElement.NotifyPropertyChanged.
| TwoWay | Changes on the data source will be replicated in the UI. Changes on the UI will be replicated to the data source. |
| ToSource | Changes will only be replicated from the UI to the data source for this binding. |
| ToTarget | Changes will only be replicated from the source to the UI for this binding. |
| ToTargetOnce | Changes will only be replicated once, from the source to the UI. This binding will be ignored on subsequent updates. |