A Zero-Allocation DependencyProperty Source Generator for WPF/MAUI | Community Feed

Registering a DependencyProperty (or MAUI BindableProperty) is tedious, repetitive, and easy to get subtly wrong. kassyi shares a source generator that collapses all of it into a single [DependencyProperty<T>] attribute — and rebuilt its synthesis engine to keep your IDE smooth.

What you’ll learn

One-line generation — [DependencyProperty<T>] emits the property, backing field, and callback wiring, auto-hooking On{Prop}Changed methods
Framework agnostic — the same attribute syntax targets WPF, .NET MAUI’s BindableProperty, Avalonia’s DirectProperty, Uno, WinUI 3, and UWP via a strategy pattern
Zero-allocation engine — a ref struct-based SourceWriter/ClassScope design that eliminates Gen2 GC spikes and IDE stutter in large solutions
Compile-time type safety — callback signature mismatches surface as Roslyn diagnostics (DPG0001) instead of silent null-callback runtime bugs
Modern C# — generic attributes, target-typed new(...) expansion, and auto-synthesized XML docs

A fork of HavenDV’s generator under the MIT license — read the full post for the before/after code and architecture notes.