title: IL / CLR / DLR References?
body: <p>I'm wanting to learn more about IL and CLR / DLR under the hood.  A friend of mine recommended the book "Inside Microsoft .NET IL Assembler", but since it came out in 2002 I fear it's pretty out of date at this point.</p>
  
  <p>Does anyone have any more up-to-date books or websites that can be used by someone who understands .NET languages to learn more about the inner workings of IL and the CLR?</p>