Kevin Gosse • 6/30/2026

Writing a .NET Garbage Collector in C# - Part 10: Finalizers

This article is part 10 of a series on building a custom .NET garbage collector in C#. It focuses on implementing finalizers, explaining how the CLR handles finalization, including non-deterministic execution, finalizer threads, resurrection, and critical finalizers. The author details the API methods required for finalization support, such as SetFinalizationRun and RegisterForFinalization, and discusses the separation of concerns between the GC and execution engine. Aimed at experienced developers, it builds on previous parts covering mark-sweep, frozen segments, and allocation strategies.

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#c #memory management #Net Garbage Collector