How to position windows correctly at 120 DPI in WPF

If you want to place a window at a specific place in WPF, it will work pretty much as you expect—unless your DPI is 120 (the default is 96). Here’s a sample that shows how to put it where you want.
In this case, I want to put a window just under another control, aligned [...]

Popularity: 5% [?]

A WPF Numeric Entry Control

When WPF first shipped, there was a noticeable lack of certain controls we’ve become used to in Win32 and WinForms: Calendar, DateTimePicker, and NumericUpDown. WPF 4 adds Calendar and DatePicker, but not anything for numeric entry.
For my solution I wanted something that behaved very similarly to the WinForms NumericUpdown control.
Some of the specifications:

Allows user [...]

Popularity: 6% [?]