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What happens inside the CLR from compilation to execution?

Senior .NET Core
Quick Answer When you write C#, Roslyn compiles it to IL (Intermediate Language), stored in a .dll assembly. The CLR loads the assembly, verifies the IL, and the JIT compiler converts it to native machine code on first execution. The GC manages memory automatically — allocating on the managed heap and reclaiming unreachable objects.

Answer

The CLR pipeline includes Roslyn compilation to IL, metadata creation, IL loading, verification, JIT compilation, and optimized native execution through tiered compilation and RyuJIT. Execution runs under GC, exception handling, and runtime type safety. Supports JIT, AOT, ReadyToRun, and NativeAOT modes.

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