Xamarin.Forms.Core 1.3.0.0 1.4.0.0 1.5.0.0 2.0.0.0 System.EventArgs Internal use only. Contains arguments for the event that is raised when a back button is pressed. To be added. Constructor 1.3.0.0 1.4.0.0 1.5.0.0 2.0.0.0 Internal use only. Initializes a new instance. To be added. Property 1.3.0.0 1.4.0.0 1.5.0.0 2.0.0.0 System.Boolean Internal use only. Gets or sets a value that indicates whether the back button event has already been handled. To be added. To be added.