Microsoft\Windows\Themes\DataGridHeaderBorder.cs (3)
177dc.DrawRectangle(border, null, new Rect(0.0, Max0(size.Height - 1.0), size.Width, 1.0));
224dc.DrawRectangle(sideBrush, null, new Rect(horizontal ? 0.0 : Max0(size.Width - 2.0), 4.0, 2.0, Max0(size.Height - 8.0)));