What is Runtime engine

Question

What is meant by the Runtime engine?

Answer 1

A Runtime engine of WF gives basic functionality in order to execute and manage the workflow lifetime. It implements in the host process and is responsible to execute every workflow instances. A host process may interact with the various runtime engines simultaneously, where each and every engine implements multipleworkflow instances. Host process interacts with the runtime engine by using any of the below classes:

a) WorkflowApplication –It  controls the implementation of single workflow instance explicitly.

b) WorkflowInvoker – It calls workflow as its method.

c) WorkflowServiceHost – It hosts workflows and permits receiving and sending the messages among several instances of the workflows.