Kevin Gosse 1/27/2026

Writing a .NET Garbage Collector in C#  - Part 6: Mark and Sweep

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This technical article is part 6 of a series on implementing a .NET garbage collector in C#. It dives into the mark phase, explaining how to identify reachable objects starting from roots like local variables, GC handles, and the finalization queue. The author details the use of the IGCToCLR interface and ScanContext structure, providing a deep look at low-level memory management and GC internals.

Writing a .NET Garbage Collector in C#  -  Part 6: Mark and Sweep

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