A Roslyn source generator that produces C# VTable function implementations from the GeneratedVTableFunctionAttribute. It parses syntax trees to extract method signatures including return types, parameters, and indices, then generates safe function pointers for COM interop. This is a genuinely reusable pattern for any project that needs to generate COM vtable stubs from annotated methods, eliminating boilerplate and error-prone manual writing.

A Roslyn source generator that auto-generates Registry serialization/deserialization methods for classes marked with RegistrySerializableAttribute. It analyzes property types and produces efficient registry read/write code. This pattern is reusable for any application that needs type-safe registry persistence without hand-written serialization code.

Configuration file for Microsoft.Windows.CsWin32 that drives automatic P/Invoke marshaling generation. Combined with the VTableFunctionGenerator, this forms a comprehensive interop layer that eliminates manual DLL imports. The pattern of using source-generated P/Invoke with custom VTable generators is applicable to any project doing extensive Win32 interop.

An abstract base class that provides strongly-typed JSON settings with change notification. Derived classes use a source-generated Set method that automatically fires PropertyChanged. This is a clean, reusable pattern for any application that needs persistent settings with UI binding support.

A thread-safe IEnumerator implementation that uses a lock to protect iteration over a shared list. This solves the common problem of iterating a collection that may be modified from another UI thread. The pattern is reusable for any concurrent collection scenario where snapshot semantics are needed.

Provides a base implementation of IStorageItemExtraProperties that bridges between Windows Storage APIs and the app's abstraction layer. It handles property retrieval with async operations and lazy initialization. This adapter pattern is reusable for projects that need to extend standard storage items with custom properties.

Uses .NET's GeneratedRegex source generator to compile regex patterns at build time for better performance. Includes patterns for alternate data streams, Windows paths, recycle bin paths, Git branch names, and drive letters. This is a reusable set of common Windows filesystem validation patterns.

A generic undo/redo history wrapper that manages a list of history entries with index tracking. Supports adding, removing, and modifying history items with proper truncation of redo stack on new actions. This is a reusable implementation of the command pattern for undo/redo functionality.