Returns true if the specified time is in a working hour time range for the specified
Infragistics.Scheduler.ScheduleResource (if one is specified) or for ANY
Infragistics.Scheduler.ScheduleResource if none is specified. Otherwise returns false.
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+