There's no shortage of music players out there. Spotify, Apple Music, Foobar2000, MusicBee — the list goes on. But if you're like me and live entirely in a local music library, most of them feel like a compromise. Either they're powerful but look like they were designed in 2009, or they look great but treat local files as an afterthought. So I built my own. Tunetastic is a native Windows music player built with WinUI 3 and C#. It's available on the Microsoft Store and fully open source on GitHub . This post is about why I built it, how it works, and the more interesting technical corners I had to navigate. Why WinUI 3? When I decided to build this, I had the usual suspects to choose from: Electron, WPF, MAUI, WinForms, or WinUI 3. Electron was out immediately — I wanted something that felt native , not a browser in a trenchcoat. WPF is mature and capable, but its design story in 2026 is rough; you're fighting against the framework to get anything that looks modern.…