Test VisualStateGroup in WPF, especially the case where a same property is targetted by multiple VisualStateGroups.
The VisualStates of ToggleButton is controlled by the following methods:
A notable behavior of VisualStateManager.GoToState method is described at Use the VisualStateManager to Manage States
If the control is already in the state that is specified, GoToState takes no action and returns
true.