Correct way to check if IEnumerable is created by a yield keyword

Question

What is the correct way to check if an IEnumerable is generated by the yield keyword ?

Sample :

public IEnumerable

        

Answer 1

I wouldn't necessarily say it's the correct way, but A way is:

someInts.GetType().Name.Contains("")

This is probably fairly reliable since this name is very abnormal. Since you're relying on deep internals it could change between any .NET release, although i feel it probably wouldn't/hasn't.

If you use this, make sure to keep a unit test to sanity check it. Such that if the internals do change, your unit test will fail on the build server.