I don't know WF very well. I am just trying to know how to transfer some information from running Workflow to its Hosting Application. I don't want to say about transfer data at the end of workflow process. My workflow is long-running. But from time to time it must send some info objects to the host application. Could anybody tell me what is a name of such technology or give me any references to msdn or some other resources. thanks.
PS. This workflow will work asynchronously.
There are several ways you can go about this but the most common way is to use a custom activity with a workflow instance extension, sometimes called activity extension.
See this blog post for more info.