Border in DrawRectangle

Answer 1

I guess not... but you may move the drawing position half the pen size to the bottom right

Answer 2

This isn't a direct answer to the question, but you might want to consider using the ControlPaint.DrawBorder method. You can specify the border style, colour, and various other properties. I also believe it handles adjusting the margins for you.

Answer 3

If you want the outer bounds of the rectangle to be constrained in all directions you will need to recalculate it in relation to the pen width:

private void DrawRectangle(Graphics g, Rectangle rect, float penWidth)
{
    using (Pen pen = new Pen(SystemColors.ControlDark, penWidth))
    {
        float shrinkAmount = pen.Width / 2;
        g.DrawRectangle(
            pen,
            rect.X + shrinkAmount,   // move half a pen-width to the right
            rect.Y + shrinkAmount,   // move half a pen-width to the down
            rect.Width - penWidth,   // shrink width with one pen-width
            rect.Height - penWidth); // shrink height with one pen-width
    }
}

Answer 4

You can do this by specifying PenAlignment

Pen pen = new Pen(Color.Black, 2);
pen.Alignment = PenAlignment.Inset; //<-- this
g.DrawRectangle(pen, rect);