Implement IEnumerable With yield

Write a Countdown class that implements IEnumerable<int>. Given a start value in its constructor, iterating it with foreach must produce the numbers from start down to 1. Implement both the generic GetEnumerator() (using yield return) and the non-generic one required by IEnumerable. Do NOT write a Main method.

For new Countdown(3) the program prints the output shown in Expected Output.

Expected Output:

3↵
2↵
1↵

= newline. The output ends with a newline — print one after the last line.

Hints4 available

Topics:

Interfaces

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