Ability to reset IEnumerator generated using yield (C#)

Question

If I use yield instead of manually creating an IEnumerator, is it possible to implement IEnumerator.Reset?

Answer 1

There's a nice workaround that I just discovered. Make your generator method return IEnumerable, not IEnumerator. Then you can do

var values = MyGeneratorMethod();
var enumerator = values.GetEnumerator();
// ... do stuff with enumerator
enumerator = values.GetEnumerator(); // instead of enumerator.Reset();

I believe itowlson's answer suggested this exact trick, but I couldn't understand it until I heard of the trick elsewhere.