question about arrays' generic interface implementation/inheritance

This is a discussion on question about arrays' generic interface implementation/inheritance within the C# Programming forums, part of the General Programming Boards category; For a change, I'll talk about programming... In .net 3.5, all arrays derive from the System.Array class. Code: (this piece ...

  1. #1
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    question about arrays' generic interface implementation/inheritance

    For a change, I'll talk about programming...

    In .net 3.5, all arrays derive from the System.Array class.

    Code:
    (this piece of code proves it:
    Console.WriteLine(new int[] { 1, 2, 3 }.GetType().BaseType);)
    //System.Array
    System.Array derives from System.Object.

    System.Array implements the following interfaces:

    System.ICloneable
    System.Collections.ICollection
    System.Collections.IEnumerable
    System.Collections.IList

    but after running this code

    Code:
              Type t = new int[0].GetType();
                  Type[] tt  = t.GetInterfaces();
                foreach (Type u in tt)
                Console.WriteLine(u);
    I discovered that arrays not only inherit the implementation of the above interfaces but also (if I'm reading this properly) implement IList<T>, ICollection<T>, IEnumerable<T>.

    can someone explain the reasoning behind arrays' implementing those 3 generic interfaces rather than having System.Array implement them and then letting the arrays inherit those implementations?
    Last edited by y99q; 11-21-2011 at 01:39 AM.

  2. #2
    Confused Magos's Avatar
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    System.Array isn't generic so it can't implement those generic interfaces.
    As for why it isn't generic is probably a relic due to backwards compatibility.
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