What is MSIL – Microsoft Intermediate Language

MSIL – Introduction

When you write your application for the .NET framework with a language such as C# or VB.NET, source code is never compiled directly into machine code , instead their compiler converts your code into a special language named MSIL (Microsoft Intermediate Language).


  • During the compile time, the compiler converts the source code into Microsoft Intermediate Language (MSIL).
  • During the runtime  , the Common Language Runtime (CLR)’s Just In Time (JIT) compiler convert the Microsoft Intermediate Language (MSIL) code into native code to the Operating System

The Complete Diagram:-


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