protected sealed override Frame CreateApplicationFrame()
 {
     if (_rootFrame == null)
     {
         _rootFrame    = base.CreateApplicationFrame();
         _frameAdapter = new AutofacFrameAdapter(_rootFrame);
     }
     return(_rootFrame);
 }
 protected sealed override Frame CreateApplicationFrame()
 {
     if (_rootFrame == null)
     {
         _rootFrame = base.CreateApplicationFrame();
         _frameAdapter = new AutofacFrameAdapter(_rootFrame);
     }
     return _rootFrame;
 }