Cannot find 'Windows.ApplicationModel' Reference in JourneyAcrossTheBridge_Build2017Edition\Step2

[VividyYang]

No code change, just clone and build. Hit Build errors when trying to compile JourneyAcrossTheBridge_Build2017Edition\Step2

DesktopBridgeToUWP-Samples\Samples\JourneyAcrossTheBridge_Build2017Edition\Step2

using Windows.ApplicationModel.Payments;

Severity Code Description Project File Line Suppression State
Error CS0234 The type or namespace name 'ApplicationModel' does not exist in the namespace 'Windows' (are you missing an assembly reference?) Step2 - Windows Forms D:\Prototype\DesktopBridgeJourney\Step2\WindowsFormsApp\Form1.cs 26 Active

[jitendrajadav]

I have a same problem not able to find "Windows" DLL