title: WP7 Textblock width in StackPanel
body: <p>I have a textblock inside a vertical stackpanel inside a horizontal stackpanel (think Facebook - the Horz stackpanel has a picture on the left and a vertical stackpanel on the right with a name and a message). </p>
  
  <p>The textblock for the message won't wrap unless I put a width on it (otherwise I guess it doesn't realize that it's at the edge of the page and the text just keeps going off to the right of the page). If I set a static width on the textblock, then the text wraps correctly. </p>
  
  <p>My problem is that I don't want a static width, because I believe different phones will have different widths in pixels, and because I want to later add support for landscape and portrait orientation. </p>
  
  <p>How can I tell my textblock to just fit the page, but not give it a static width, since width=Auto isn't working? </p>
  
  <p>thanks!</p>