Fluent Interface

Nope, not interested on the "Fluent Interfaces Are Not Internal DSLs" war. Just describing it:

IInterfaces interface = context.Session
  .CreateInterface(typeof(Fluent))
      .MatterIfIsDSL (Please.Dont)
      .AddComment("Ok, not a proper internal DSL, but who cares")
      .AddComment("Cool way to manifest declaration intentions on an imperative environment");

Ok, maybe Fowler is better than me describing patterns...