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    Just a note about structures in C#: They are no typical structs, like you know them in C. In fact, they do also support OOP with inheritance, encapsulation and polymorphism. Besides some peculiarities the main difference is how the runtime handles instances when they are passed to other objects: structures are value types and classes are reference types! Commented Apr 2, 2014 at 15:05
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    @Aschratt: Structures don't support inheritance. Structures can implement interfaces, but structures that implement interfaces behave differently from class objects that do likewise. While it's possible to make structs behave somewhat like objects, the best use case for structs in when one wants something that behaves like a C struct, and the things one is encapsulating are either primitives or else immutable class types. Commented Apr 5, 2014 at 23:19
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    +1 for why "it's not equal to having global functions." This hasn't been much addressed by others. (Although if you have several decks, a global function would still return different values for distinct instances of the same card). Commented Apr 6, 2014 at 10:05
  • @supercat This is worthy of a separate question or a chat session, but I'm not currently interested in either :-( You say (in C#) "structures that implement interfaces behave differently from class objects that do likewise". I agree that there are other behavioral differences to consider, but AFAIK in code following Interface iObj = (Interface)obj;, the behaviour of iObj is not affected by the struct or class status of obj (except that it will be a boxed copy at that assignment if it is a struct). Commented Jul 2, 2014 at 2:17
  • You said: "Shall we create many Card instances for each ace of spade?" Would you not? Commented Nov 12, 2019 at 4:53