Could Not load file or assembly "Microsoft.BizTalk.Scheduler" or one of its dependencies

While working on the Scheduler POC for the article BizTalk Server : Scheduling Orchestration using Trigger Message, received below error while deploying the application using the visual studio.

Why it happened:  

It happened because Microsoft.BizTalk.Scheduler  assembly which is used by Scheduled Task Adapter was missing in the GAC .

What to do :

·         Open BizTalk administration console

·         Right click on application "BizTalk Application 1"  (The shared application in which assemblies related to scheduled Task Adapter is installed)

·         Select Add | BizTalk Assemblies

·         Click the Add button

·         Browse and select C:\Program Files (x86)\Microsoft BizTalk Server 2013\Microsoft.BizTalk.Scheduler.DLL

·         Click Open

·         Check on Overwrite all

·         Check on:

·         “Add to the global assembly cache on add resource (gacutil)”

·         “Add to the global assembly cache on MSI import (gacutil)”

·         “Add to the global assembly cache on MSI file install (gacutil)”