--- title: Avalonia UI Theming - Hand Coded From Scratch | Setup description: Building a fully custom Avalonia UI theme from scratch — no AI shortcuts, just real hand-coded development. This is the first video in a complete series on... canonical: https://daily.dev/posts/avalonia-ui-theming---hand-coded-from-scratch-setup-ihfqsy8g6 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Avalonia UI Theming - Hand Coded From Scratch | Setup | daily.dev og:description: Building a fully custom Avalonia UI theme from scratch — no AI shortcuts, just real hand-coded development. This is the first video in a complete series on... og:url: https://daily.dev/posts/avalonia-ui-theming---hand-coded-from-scratch-setup-ihfqsy8g6 og:image: https://api.daily.dev/og/posts/IhfQSy8g6.png og:image:alt: Avalonia UI Theming - Hand Coded From Scratch | Setup og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Avalonia UI Theming - Hand Coded From Scratch | Setup **[AngelSix](https://daily.dev/sources/angelsix)** · 14 min read · 0 upvotes · 0 comments ## Summary Building a fully custom Avalonia UI theme from scratch — no AI shortcuts, just real hand-coded development. This is the first video in a complete series on creating professional Avalonia UI themes by hand. In this video we set up the entire development environment ready to build a custom Avalonia theme from the ground up. Whether you're coming from WPF, WinUI 3, or starting fresh with Avalonia UI, this is where it all begins. What we cover: - Setting up the project environment for Avalonia UI theming - Understanding the structure needed for custom theme development - What we'll be building across the full series No AI-generated code. No shortcuts. Just real senior-level engineering, given away for free. 📌 Chapters:0:00 - Introduction 0:53 - Project Structure Overview 1:36 - Creating the Demo App 2:33 - Creating the Theme Project 3:51 - Linking the Theme to the Demo App 4:13 - Getting the Fluent Theme Source 6:11 - Fixing the Version Mismatch 7:01 - Renaming Fluent to Prototype 9:13 - Troubleshooting Build Errors 12:44 - Final Project Rename 13:24 - Theme Compiles — What's Next 🔗 Website: www.angelsix.com ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#avalonia](https://daily.dev/tags/avalonia) [View this post on daily.dev](https://daily.dev/posts/avalonia-ui-theming---hand-coded-from-scratch-setup-ihfqsy8g6) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Avalonia UI Theming - Hand Coded From Scratch | Setup","url":"https://daily.dev/posts/avalonia-ui-theming---hand-coded-from-scratch-setup-ihfqsy8g6","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/avalonia-ui-theming---hand-coded-from-scratch-setup-ihfqsy8g6"},"datePublished":"2026-10-04T13:04:33.449Z","dateModified":"2026-10-04T21:52:31.003Z","description":"Building a fully custom Avalonia UI theme from scratch — no AI shortcuts, just real hand-coded development. 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