[willtim]

Side-effects do not mix with lazy on-demand streams! This is unfortunately a problem with bringing functional programming constructs to a language with idiomatic pervasive mutation.

[lostmsu]

BTW, this is a non-issue with C# 1.0 and later due to `yield return` syntax.

[twhitmore]

Sorry, I'm skeptical -- how exactly does a 'yield return' resolve the divergences between functional programming & mutable data structures?

My layman's impression was that 'yield return' was largely syntactic sugar around an iterator, rather similar to Java.

[lostmsu]

The comment you responded too were talking about debug experience.