49 lines
750 B
C#
49 lines
750 B
C#
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using System;
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using System.Collections;
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using System.Collections.Generic;
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class Foo {}
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class Bar : Foo {
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public string Name { get; set; }
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}
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class Collection<T> : IEnumerable<T> where T : Foo {
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List<T> list = new List<T> ();
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public void Add (T t)
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{
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list.Add (t);
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}
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public IEnumerator<T> GetEnumerator ()
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{
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foreach (T t in list)
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yield return t;
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}
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IEnumerator IEnumerable.GetEnumerator ()
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{
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return GetEnumerator ();
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}
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}
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class BarCollection : Collection<Bar> {}
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class Program {
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public static int Main ()
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{
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var collection = new BarCollection () {
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new Bar { Name = "a" },
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new Bar { Name = "b" },
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new Bar { Name = "c" },
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};
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foreach (var bar in collection)
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Console.WriteLine (bar.Name);
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return 0;
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}
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}
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