System.Object
   C1.iOS.Viewer.FontCache
   C1.iOS.Viewer.MenuItem
   Foundation.NSObject
      UIKit.UIResponder
         UIKit.UIView
            C1.iOS.Viewer.FlexViewer
   System.EventArgs
      C1.iOS.Core.AsyncEventArgs
         C1.iOS.Viewer.DocumentStreamEventArgs
         C1.iOS.Viewer.SaveDocumentStreamEventArgs
      C1.iOS.Viewer.MenuItemClickedEventArgs

Reference

C1.iOS.Viewer Assembly