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0343 Using yield to implement an IEnumerator

using System; using System.Collections; public class MyCollection : IEnumerable { int[] data = { 1, 2, 3 }; public IEnumerator GetEnumerator() { foreach (int i in data) yield return i; } } class Sample { public static void Main() { foreach (int i in new MyCollection()) Console.WriteLine(i); } } The output: 1 2 3