Code

Pen lanePen = null;
Brush laneBrush = null;

// The pen used to draw cell borders
switch (calendar1.ResourceViewSettings.GridStyle)
{

	case LineStyle.Dotted:
		laneBrush = new HatchBrush(HatchStyle.Percent50,
			calendar1.ResourceViewSettings.Style.LineColor, Color.Transparent);
		lanePen = new Pen(laneBrush, 1);
		break;

	case LineStyle.Solid:
		lanePen = new Pen(calendar1.ResourceViewSettings.Style.LineColor, 1);
		break;

	case LineStyle.Invisible:
		lanePen = new Pen(Color.Transparent, 1);
		break;

}

for (int i = 0; i < cells.Count; i++)
{
	Rectangle cell = cells[i];

	using (Brush brush = calendar1.ResourceViewSettings.WeekendStyle.Brush.CreateGdiBrush(cell))
	{
		e.Graphics.FillRectangle(brush, cell);
		e.Graphics.DrawRectangle(lanePen, cell);
	}
}

lanePen.Dispose();
if (laneBrush != null)
	laneBrush.Dispose();