Does "delegate" mean a type or an object?

Posted by Michal Czardybon on Stack Overflow See other posts from Stack Overflow or by Michal Czardybon
Published on 2009-07-28T10:37:26Z Indexed on 2010/06/18 9:43 UTC
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Reading from MSDN: "A delegate is a type that references a method. Once a delegate is assigned a method, it behaves exactly like that method."

Does then "delegate" mean a type or an object?!

...It cannot be both. It seems to me that the single word is used in two different meanings:

  1. a type containing a reference to a method of some specified signature,
  2. an object of that type, which can be actually called like a method.

I would prefer a more precise vocabulary and use "delegate type" for the first case. I have been recently reading a lot about events and delegates and that ambiguity was making me confused many times.

Some other uses of "delegate" word in MSDN in the first meaning:

  • "Custom event delegates are needed only when an event generates event data"
  • "A delegate declaration defines a class that is derived from the class System.Delegate"

Some other uses of "delegate" word in MSDN in the second meaning:

  • "specify a delegate that will be called upon the occurrence of some event"
  • "Delegates are objects that refer to methods. They are sometimes described as type-safe function pointers"

What do you think? Why did people from Microsoft introduced this ambiguity? Am I the only person to have conceptual problems with different notions being referenced with the same word.

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