title: Opening new workspace from child viewmodel
body: <p>i've written a project that is based on the MVVM customer example on MSDN. How would i add a new workspace from a child view model? I don't like the idea of making the Workspaces collection static as this seems to go against the pattern.</p>
  
  <p>i'm effectively trying to add a new customer view when an element in the allcustomers view is double clicked.</p>
  
  <p>thanks in advance</p>