at System.Drawing.Graphics.Dispose () in /mono/head/mcs/class/System.Drawing/System.Drawing/Graphics.cs:line 267
   at System.Windows.Forms.PaintEventArgs.Dispose () in /mono/head/mcs/class/Managed.Windows.Forms/System.Windows.Forms/PaintEventArgs.cs:line 91
   at System.Windows.Forms.PaintEventArgs.Finalize () in /mono/head/mcs/class/Managed.Windows.Forms/System.Windows.Forms/PaintEventArgs.cs:line 82