System.TypeInitializationException: An exception was thrown by the type initializer for System.Windows.Forms.MimeIconEngine ---> System.EntryPointNotFoundException: gdk_pixbuf_save_to_buffer
  at (wrapper managed-to-native) System.Windows.Forms.GnomeUtil:gdk_pixbuf_save_to_buffer (intptr,intptr&,uintptr&,string,intptr&,intptr)
  at System.Windows.Forms.GnomeUtil.GdkPixbufToImage (IntPtr pixbuf) [0x00000] 
  at System.Windows.Forms.GnomeUtil.GetIcon (System.String icon, Int32 size) [0x00000] 
  at System.Windows.Forms.GnomeHandler.AddGnomeIcon (System.String internal_mime_type, System.String name) [0x00000] 
  at System.Windows.Forms.GnomeHandler.CreateUIIcons () [0x00000] 
  at System.Windows.Forms.GnomeHandler.Start () [0x00000] 
  at System.Windows.Forms.MimeIconEngine..cctor () [0x00000] --- End of inner exception stack trace ---

  at <0x00000> <unknown method>
  at System.Windows.Forms.UnixFileSystem..ctor () [0x00000] 
  at System.Windows.Forms.MWFVFS..ctor () [0x00000] 
  at System.Windows.Forms.FileDialog..ctor () [0x00000] 
  at System.Windows.Forms.OpenFileDialog..ctor () [0x00000] 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.OpenFileDialog:.ctor ()
  at MoMA.MainForm.AssemblyAddButton_Click (System.Object sender, System.EventArgs e) [0x00000] 
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void_object_EventArgs (object,System.EventArgs)
  at System.Windows.Forms.Control.OnClick (System.EventArgs e) [0x00000] 
  at System.Windows.Forms.Button.OnClick (System.EventArgs e) [0x00000] 
  at System.Windows.Forms.ButtonBase.OnMouseUp (System.Windows.Forms.MouseEventArgs mevent) [0x00000] 
  at System.Windows.Forms.Button.OnMouseUp (System.Windows.Forms.MouseEventArgs e) [0x00000] 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x00000] 
  at System.Windows.Forms.ButtonBase.WndProc (System.Windows.Forms.Message& m) [0x00000] 
  at System.Windows.Forms.Button.WndProc (System.Windows.Forms.Message& m) [0x00000] 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x00000] 
  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr wParam, IntPtr lParam) [0x00000]