The Book of the Runtime

Welcome to the Book of the Runtime (BOTR) for the .NET Runtime. This contains a collection of articles about the non-trivial internals of the .NET Runtime. Its intended audience are people actually modifying the code or simply wishing to have a deep understanding of the runtime.

Below is a table of contents.

• Book of the Runtime FAQ
• Introduction to the Common Language Runtime
• Garbage Collection Design
• Threading
• RyuJIT Overview
• Porting RyuJIT to other platforms
• Type System
• Type Loader
• Method Descriptor
• Virtual Stub Dispatch
• Stack Walking
• System.Private.CoreLib and calling into the runtime
• Data Access Component (DAC) Notes
• Profiling
• Implementing Profilability
• What Every Dev needs to Know About Exceptions in the Runtime
• ReadyToRun Overview
• CLR ABI
• Cross-platform Minidumps
• Mixed Mode Assemblies
• Guide For Porting
• Vectors and Intrinsics

It may be possible that this table is not complete. You can get a complete list by looking at the directory where all the chapters are stored:

• All Book of the Runtime (BOTR) chapters on GitHub