I would like to have a document content host containing a single panel of content, with no Tab control. Is that feasible?
The DocumentContentHost is a control specifically designed to mimic the tabbed document interface in VS which allows panes to be dragged into/out of the tabbed document area. If you don't want a tabbed document interface then you can just put any other element as the Content of the xamDockManager. Note, you won't be able to drag content into/out of this area then.