Occurs when the target of the Command should reevaluate whether or not the Command can be executed.
Syntax
Remarks
Requirements
Namespace: Xamarin.Forms
Assembly: Xamarin.Forms.Core (in Xamarin.Forms.Core.dll)
Assembly Versions: 1.0.0.0, 1.1.0.0, 1.2.0.0, 1.3.0.0