I’ve recently published a free screencast on how to manage context information when using a .NET client to interact with workflow services. 



This screencast shows how to manage context in .NET applications to enable multiple calls on the same proxy for different workflow instances, or to make calls to an existing workflow instance with a new proxy/channel.

NOTE: for reusing the same channel to make calls to different services, you should see this blog post that provides details on some extra steps required to turn off the automatic context management.  If you fail to do this step, you will get the following exception message: “Context cached at the channel layer cannot be changed after the channel is opened.” 

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