$ mono wordpad.exe

Unhandled Exception: System.ArgumentNullException: Argument cannot be null.
  at (wrapper managed-to-native) System.Windows.Forms.XplatUIWin32:Win32GetMessa
ge (System.Windows.Forms.MSG&,intptr,int,int)
  at System.Windows.Forms.XplatUIWin32.GetMessage (System.Windows.Forms.MSG& msg
, IntPtr hWnd, Int32 wFilterMin, Int32 wFilterMax, Boolean blocking) [0x00000]
  at System.Windows.Forms.XplatUIWin32.GetMessage (System.Object queue_id, Syste
m.Windows.Forms.MSG& msg, IntPtr hWnd, Int32 wFilterMin, Int32 wFilterMax) [0x00
000]
  at System.Windows.Forms.XplatUI.GetMessage (System.Object queue_id, System.Win
dows.Forms.MSG& msg, IntPtr hWnd, Int32 wFilterMin, Int32 wFilterMax) [0x00000]

  at System.Windows.Forms.Application.RunLoop (Boolean Modal, System.Windows.For
ms.ApplicationContext context) [0x00000]
  at System.Windows.Forms.Form.ShowDialog (IWin32Window ownerWin32) [0x00000]
  at System.Windows.Forms.Form.ShowDialog () [0x00000]
  at System.Windows.Forms.MessageBox+MessageBoxForm.RunDialog () [0x00000]
  at (wrapper remoting-invoke-with-check) MessageBoxForm:RunDialog ()
  at System.Windows.Forms.MessageBox.Show (System.String text, System.String cap
tion, MessageBoxButtons buttons, MessageBoxIcon icon) [0x00000]
  at WordPad.Configuration.Load () [0x00000]
  at WordPad.Configuration.Apply (WordPad.WordPad wordpad) [0x00000]
  at WordPad.WordPad..ctor (System.String file) [0x00000]
  at (wrapper remoting-invoke-with-check) WordPad.WordPad:.ctor (string)
  at WordPad.WordPad.Main (System.String[] args) [0x00000]