WPF High-DPI Support — Why It Still Blurs and Bleeds Despite Being 'Supposedly DPI-Aware,' and How to Fix It (archived 2026-07-27)

WPF lays out UI in DIPs (1/96 inch) and is System DPI Aware from the start, but moving a window to a monitor with a different DPI blurs the whole screen, and bitmaps and thin lines still look fuzzy. This guide walks through diagnosing the cause, declaring Per-Monitor DPI support on .NET Framework 4.6.2+ and .NET, standard fixes like UseLayoutRounding, and the pitfalls of mixing in WindowsFormsHost content — all from a practical, hands-on perspective. Archived version of https://comcomponent.com/en/blog/wpf-high-dpi-guide/, as published on 2026-07-27. The live article is maintained and may change after this date. First published 2026-07-03.