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Answer Posted / banaja
public class ExampleIterator : IEnumerable {
public IEnumerator GetEnumerator() {
yield return 1;
}
}
The class ExampleIterator implements the IEnumerable
interface, which requires the GetEnumerator method to be
implemented. The GetEnumerator method returns an
IEnumerator instance. In the implementation of
GetEnumerator, the value 1 is returned rather than an
IEnumerator interface instance. This is odd, because how
can a value type be returned when a reference type is
expected? The magic is the yield keyword, which provides
the missing code in the form of generated IL.
The yield keyword is a compiler directive that generates a
very large chunk of IL code. Using ILDASM.exe it is
possible to reverse engineer what the compiler generated
| Is This Answer Correct ? | 3 Yes | 0 No |
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