In addition to official samples, you may explore the following opensource projects made by GitHub users:
Custom C# chat bot for Twitch TV
https://github.com/SimpleSandman/TwitchBot
A simple tool for viewing live camera streams, written in C# (C Sharp)
https://github.com/MarcelloCalligaris/SeeSharpCameraViewer
Portcase Player is all in one Video Player, Audio Player, Torrent Player and IPTV Player with TV guide and Catch-Up service support.
https://play.google.com/store/apps/details?id=com.portcase.player.android&hl=en
Open source surveillance software
https://github.com/ispysoftware/iSpy
https://github.com/AvaloniaCommunity/Avalonia.FuncUI
A easy-to-use Sony Walkman media manager (VB.NET)
https://github.com/guo40020/WalkmanManager
CloudStream 2 is a Windows and Android streaming app for movies, tv-shows and anime
https://github.com/LagradOst/CloudStream-2
Desktop software for TikTok
https://github.com/ShiiroSan/TikTokForWindows
Multi-platform JCF player
https://github.com/hyvart/Unjammit
Beautiful WPF Control UI
https://github.com/aduskin/AduSkin
Animated Wallpaper System