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Source

blogs.msdn.com (Presentation Source), posted 2007-10-06

Added By

Actipro on 2007-10-06

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Summary

A discussion on why lines can be anti-aliased when rendered in WPF. Note that WPF 4 adds some features that can fix this issue.

Excerpt

"WPF was designed from the start to be resolution independent. So instead of designing your UI in terms of pixels, you are encouraged to use a physical measuring unit (like inches). When you specify coordinates in WPF, you are actually using "measure units", which are defined to be 1/96th of an inch. This was chosen because 96 DPI monitor settings are very common. When WPF renders to the screen, it takes into account the system DPI, which you can set from the display control panel. Of course, one problem with this is that no one ever sets this correctly. When was the last time you took out a ruler, measured your screen, then divided your resolution by the result? Another reason people don't set the DPI correctly is that Windows doesn't always look good at non-standard DPI settings. This is something we will be improving in the future. Of course, since you have to recalculate the DPI settings everytime you adjust your resolution, it would be..."