public event CalloutContentUpdatingEventHandler CalloutContentUpdating
The event handler receives an argument of type CalloutContentUpdatingEventArgs containing data related to this event. The following CalloutContentUpdatingEventArgs properties provide information specific to this event.
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+