CLR's class loading services

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I read topic from google and I understand this:

    Windows loader loads the exe or dll of .net app.
    Then windows loader creates clr for that process.
    Then it locates entry point to application and call it.
    But before that class loader service of clr comes and loads the class containing Main method.
    And then jit compilation takes place.
    The clr provoids services like gc,exception handling,class loading etc to our app.

My questions are:

Now when we run .net app clr locates entry point and starts execution . But when it encounters

Class1 ob = new Class1();  

that time how our process calls the service of CLR called as class loader? MSIL code equivalent to is newobj internally calls to clr's class loader service?

Posted 4-Nov-12 19:41pm

fdiu

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http://www.tebyan.net/newindex.aspx?pid=31159&BookID=23914&PageIndex=23&Language=3[^]

Posted 5-Nov-12 3:57am

fdiu

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Rai Pawan · Accepted Answer · 2012-11-04T19:53:00

The process works like this:

1. particular language code gets compiled to MSIL assembly/assemblies.

2. An assembly resembles the windows PE file in a way that the first instruction in the assembly always loads the CLR which takes over in terms of compiling the rest of the content of the corresponding assembly.

Now comes your question wherein you asked how does CLR loads the classes being referenced in the assembly. For this to understand you need to know little bit more on what is dot net assembly and what content it holds. An assembly always have two things:

1. Assembly manifest
2. MSIL code

Apart from many other things the assembly manifest part contains all the references of any other assebmlies (that might contain the MSIL code of classes that are referenced in this MSIL) or any other resources i.e., documentataion, dlls referenced any other information. So the CLR looks up this part and compiles/executes the corresponding assembly accordingly.

I'd recommend that you drill down on what, why and how of dot net assemblies.

Regards
Pawan