Windows Workflow Foundation?

What is Windows Workflow Foundation?

WWF is a programming model for building workflow-enabled applications on windows. System. Workflow namespace has all the necessary modules to develop any type of workflow.

What is a Workflow?

A Workflow is a set of activities, which is stored as model and they depict a process. Below figure depicts clearly the difference between Workflow and Activity. Every task is an activity and group of activity depicts a complete workflow. Workflow is run by the Workflow runtime engine.

What are different types of Workflow in Windows Workflow foundation?

There are two basics type of workflow Sequential Workflow and State machines workflow.
A sequential workflow has clear start and finish boundaries. Workflow controls execution in Sequential workflow. In sequential execution, one task is executed after other. Sequential workflow is more rigid in format and execution path has a deterministic nature.

A State machine workflow is more dynamic in nature. Workflow has states and the state waits for events to help it move to next state. In State machine execution path is undeterministic nature.
Below figure shows visual conceptualization of fundamentals. You can see in Sequential workflow the execution path is very determent. Shiv performs the entire task sequentially and these tasks are very determent. Now have a look at the second workflow. Every state goes to other state when it receives some external events. For instance when Shiv is seeing star trek there is an event of flashing news which triggers him to see the flashing new.