Found 4 packages
A TaskDialog wrapper class with fallback emulator (for XP and earlier).
.Net Core 3.1 port of Sean A. Hanley's TaskDialog.WPF library.
RTL version of WPF Task Dialog project. Main project is here: https://github.com/yadyn/WPF-Task-Dialog
WPF implementation of task dialog for CreativeCoders.Mvvm.DialogServices.TaskDialog