.net - Does the .exe file produced by the C# compiler consist solely of Common Intermediate Language(CIL)? -

i trying better grasp on happens in simple scenario when following code added file , saved .cs extension:

public class helloworld {   public static void main()   {     system.console.writeline("hello world!");     system.console.readline();   } } 

and program run @ windows command line with:

c:\windows\microsoft.net\framework\v4.0.30319>csc /t:exe /out:c:\helloworld\helloworld.exe c:\helloworld\helloworld.cs 

i can see process produces .exe file, when reading compile process on wikipedia states:

1. source code converted common intermediate language (cil), cli's equivalent assembly language cpu.
2. cil assembled form of so-called bytecode , cli assembly created.
3. upon execution of cli assembly, code passed through runtime's jit compiler generate native code...
4. the native code executed computer's processor.

so .exe file consist solely of common intermediate lanaguage? , file wikipedia article refers 'cli assembly'? i'm bit confused because can see .exe file , me term 'assembly' infers more 1 file.

and related question:

• is jit compiler somewhere in microsoft.net directory , upon executing .exe file file communicates jit compiler outputs instructions in native code?

no, doesn't.

the executable pe image.

see anatomy of .net assembly – pe headers details.

.net assemblies built on top of pe (portable executable) file format used windows executables , dlls, built on top of msdos executable file format. reason when .net 1 released, wasn’t built-in part of operating system nowadays. prior windows xp, .net executables had load other executable, had execute native code start clr read & execute rest of file.