Code

	using (FileStream stream = new FileStream(path, FileMode.Create)) {
	  Graphics g = diagramView.CreateGraphics();
	  IntPtr hDC = g.GetHdc();
	  Metafile metafile = new Metafile(stream, hDC);
	  g.ReleaseHdc(hDC);
	  g.Dispose();

	  Graphics gMeta = Graphics.FromImage(metafile);
	  Diagram diagram = diagramView.Diagram;
	  gMeta.FillRectangle(new SolidBrush(diagramView.BackColor), diagramView.Bounds);

	  foreach (DiagramItem item in diagram.Items) {
	    if (item.Visible) {

		item.Draw(gMeta, false);  //ERROR!

	    }
	  }

	  gMeta.Dispose();
	  metafile.Dispose();
	}