even after adding a CookieContainer (see WorkflowWebService). The problem is that the cookie is never added to the response as this is done by WorkflowWebHostingModule http module. So to enable conversations just add the following to the web.config.

The recommended work around for this is to write your own web service proxy class by deriving from WorkflowWebService. Here's a rough sample which we recommend. After talking to the dev team about this we're considering putting out a sample that helps you generate this more directly.

    public class myWFWebService : WorkflowWebService