Common Language Runtime

CLR is an unified environment for all the languages in .NET means there is no difference in writing code as VB.NET , C#.NET, VJ#.NET, PERL.NET,COBOL.NET,MANAGED C++.NET,.....

I would like to give a small scenario how CLR works:

Java programmers can compile their source like

java source ==> Java Compiler ==> Byte Code ==> JVM ==> Executable Code

ex.java ==> javac ==> ex.class ==> JVM ==> binary code

Now the byte code here is called as Intermediate code which can run 0n any OS .
In the same way

c# code vb code vj# code perl.net code


c# compiler vb compiler vj compiler perl compiler



INTERMEDIATE CODE (CIL) : common intermediate language


CLR


JIT Compilation


EXECUTABLE CODE

here the Intermediate code in the source for CLR which gives the binary code.
The main components in CLR as follows:

Class Loader, IL to native compiler, code manager, Garbage Collector, security engine, debug engine, type checker, exception manager, Thread management, COM marshaler.

the part of JIT Just-in-Time compiling is part of IL to native compiler.