“YieldExceptionYield” (Problem)

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At what point will happen Exception?
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public static IEnumerable<int> GetSmallNumbers()
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{
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  yield return 1;
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  throw new Exception();
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  yield return 2;
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}
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void Main()
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{
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  var numbers = GetSmallNumbers();
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  var evenNumbers = numbers.Select(n => n * 2);
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  Console.WriteLine(evenNumbers.FirstOrDefault());
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}
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“QueryAfterRemove” (Problem)

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