Device context handle not released

[ghost]

Hello,

i get sometimes an exception when the system is suspendend or hibernated:

System.InvalidOperationException: The object is currently in use elsewhere..
bei System.Drawing.Graphics.GetHdc()
bei System.Drawing.BufferedGraphics.RenderInternal(HandleRef refTargetDC, BufferedGraphics buffer)
bei System.Drawing.BufferedGraphics.Render()
bei System.Windows.Forms.Control.WmPaint(Message& m)
bei System.Windows.Forms.Control.WndProc(Message& m)
bei System.Windows.Forms.PropertyGridInternal.PropertyGridView.WndProc(Message& m)
bei System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
bei System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
bei System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

which may link to some not released device context handle. It occurs very sporadically.

Regards
Martin