I love reading the Mono source. The contributors have done such an awesome job.
// LAMESPEC: is funny. There's nothing quite like an _implementation_ to point out the gaps in your specification..
Rotor is cool too, as are the Common Language Infrastructure (CLI) and C# Language specifications (except for when they're lame! ;)
I've been thinking about the whole operator overloading thing, and wrote some sample code to test a few things, then got confused by what was going on, so I went to check out the various implementations, so much easier to read code than a LAMESPEC.
      SqlInt32  i = new SqlInt32(123);
      SqlInt32  i1 = SqlInt32.Null;
      SqlInt32  i2 = SqlInt32.Null;
      if (i1 == i2) { // (note: there must be an implicit SqlBoolean=>bool cast here!
        Console.WriteLine("you won't see this");
      }
      Console.WriteLine(i == i1);                         // SqlBoolean.Null
      Console.WriteLine(i1 == i2);                        // SqlBoolean.Null
      Console.WriteLine(Object.ReferenceEquals(i1, i2));  // false (boxing)
      Console.WriteLine(i1.Equals(i2));                   // true (shit hey)
John.