I would like to draw a one pixel width rectangle on my D2DControl surface using DrawRectangle with the default stroke width of 1.
However, the rectangle is two pixels wide on my monitor and seems to be a blend of the foreground and background colours.

The line should be Red i.e. R:255,G:0,B:0 but you can see it is not.
Two questions:

1. How to I get a single pixel line (is this related to DPI as per my previous issues)?
2. How to not blend the pen colour with the background colour?

Andy