title: How to save a NSMutableDictionary into a file in documents?
body: <p>I would like to save the content of a NSMutableDictionary object to a file. How do I do this ? I already know how to do this task with a NSDictionary object but I don't know how to convert/copy this NSMutableDictionary to a NSDictionary...unless there's a method to write directly the content of NSMutableDictionary to a file...I stress that the NSMutableDictionary object contains objects of NSDictionary type.</p>
  
  <p>Thx for helping,</p>
  
  <p>Stephane</p>