Pixel behaviour of FillRectangle and DrawRectangle

Question

nearly every time I use Graphics.DrawRectangle or Graphics.FillRectangle (the int versions) I seem to miss the pixels on the right and

Answer 1

The rectangle in both of the Graphics methods in your question is bounded by (x, y) in the upper left and (x + width - 1, y + height - 1) in the lower right. This is a consequence of specifying width and height, rather than the lower right point.

When you're calculating the width and height from two points, you have remember to include the origin pixel by adding 1 to the difference.

For example, say you want to fill a Rectangle from point (5, 5) to point (10, 20). The width of the rectangle is 6, not 5. The height of the rectangle is 16, not 15.