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  • I don't want to sound like the members of the local question-closing militia but this has been discussed over and over eleventy billion times here. stackoverflow.com/questions/479142/… Commented Mar 25, 2009 at 13:33
  • Totally agree; asked many times before. Commented Mar 25, 2009 at 13:34
  • Well, this question is about "what's the difference", while that other one is "when would you use one or the other" - that's different enough IMHO to warrant its own question... Commented Mar 25, 2009 at 13:34
  • @DevSolar: slight variations of this question appear many times, not just that one quoted... Commented Mar 25, 2009 at 13:35
  • stackoverflow.com/questions/56867/interface-vs-base-class Commented Mar 25, 2009 at 13:35