IllusoryStudios.Wpf.LostControls (nuget): WPF lacks some basic functionality, so I coded it up and share the result with you here. Controls and windows include InputBox (like the VB6 function but more powerful), EditableLabel, ThumbnailPanel, and more. There are also helpers for associating with file types and starting up with Windows.
Keywords: WPF|InputBox|editable|label|thumbnail|association|startup