Trivia: when is a no-op not a no-op? : CSharp Feeds

Trivia: when is a no-op not a no-op?

by skeet via Jon Skeet's Coding Blog : C# on 3/2/2008 7:05:27 PM

Hopefully most readers are familiar with the yield break; statement. Usually, if it appears at the end of a method its a no-op which can be removed with no change in behaviour. For instance:

public IEnumerable<int> Range1 (int start, int count)
{
    for (int i=0; i < count; i++)
    {
         yield return start+i;
    }
    yield break;
}

public IEnumerable<int> Range2 (int start, int count)
{
    for (int i=0; i < count; i++)
    {
         yield return start+i;
    }
}

Can anyone think of a situation where a yield break; directly before the closing brace of a method cannot be removed without breaking the code? (I suggest that early answers are given in ROT-13 to avoid spoiling it for anyone else.)

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Original Post: Trivia: when is a no-op not a no-op?