Hello ,
is there some one who can give me some information ,about a book or a URL on how .net framework speaks with Windows
make it clear (its not how application work with framework , or some thing like how clr works)
how the entire .net framework speaks with Windows , what it uses (does it use api's or some thing new if api's please please specify the url where i can get the information about the same)

How framework speaks with OS
Vijay TS
I am not sure this belongs in this forum but anyways--
Just download Reflector and check whichever class/method you like (http://www.aisto.com/roeder/dotnet/)
Arnon
Billy Hui
Well, there is nothing documented about it. Perhaps, you can take a look at Rotor (SSCLI), an open-source implementation of .NET and C# from Microsoft or Mono, a non-Microsoft implementation of .NET for Linux. These might give you the low-level details you are looking for.
SSCLI: http://www.microsoft.com/downloads/details.aspx FamilyId=3A1C93FA-7462-47D0-8E56-8DD34C6292F0&displaylang=en
Mono: www.go-mono.org