Hi everybody,
Got answer for this after a long struggle.
Here solution is, we can restore the state workflow in which state we left it by using rehydration.
For this declare an event in your interface and define that event in the service class. Now go to workflow design and give the event name and call one external method.
the link which i got answer is shown below with help of this i solved this issue.
Navigational Workflows Unleashed in WWF/ASP.NET 3.5[
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