Pen object Width property does not seem to be in pixels

[aewarnick]

How do I convert the Pen.Width property to a pixels unit?

[divil]

It should be in pixels unless you've changed the scaling transform of the graphics you're drawing to.

[aewarnick]

Yes, I found that it was not the Pen it was how DrawRectangle draws the lines!!!! It is very annoying!!!!!!!

 

Here is the rectangle I have to use to draw a border:

this.BorderRect=new Rectangle(this.borderWidth/2, this.borderWidth/2, this.Size.Width-this.borderWidth, this.Size.Height-this.borderWidth);

 

The top and left edges start the line in the middle and move out half and half. The right and bottom edges start on the inside and draw out!!

 

Why?