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Where yield Is Not Allowed

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1. What foreach Really Does

2. Your First yield return

3. Nothing Runs Until You Ask

4. Every foreach Starts Over

5. Sequences Without End

6. Where yield Is Not Allowed

Overview Theory (2)Quiz Tasks (2)

7. Iterators That Wait

Course Navigation

1. What foreach Really Does

2. Your First yield return

3. Nothing Runs Until You Ask

4. Every foreach Starts Over

5. Sequences Without End

6. Where yield Is Not Allowed

Overview Theory (2)Quiz Tasks (2)

7. Iterators That Wait

Module 6: Where yield Is Not Allowed

Rules and traps

A quick multiple-choice check before you move on. Answer every question, then submit to see how you did.

1.Which of these is legal in an iterator?

2.A foreach breaks early out of an iterator that has a finally. What happens?

3.Why can an iterator method not have an out parameter?

Answer every question to submit.

Cleanup That Still Happens