But started getting following Error in event log after every 2 minutes interval
From error it was clear either Assembly is not GAC'ed or I missed to restart the host instance.I cross verified the GAC, found the assembly is present also restarted the associated host instance - error still showing up after two minutes.
Why it happened
The above errors were on BizTalk 2013R2, so just to clear the doubt about the BizTalk version - Installed it on my BizTalk 2016 VM - same error.Have contacted Microsoft, they too found same issue and they have started working on fixing the issue.
What to do
As soon Microsoft provides the solution , will be updating here.
For now, I have created a helper class around the EMS dll to go ahead with my project.