How to replace for-loops with a functional statement in C#?

Question

A colleague once said that God is killing a kitten every time I write a for-loop.

When asked how to avoid for-loops, his answer was to use a functional language. However

Answer 1

Sometime you don't kill just one kitten.

for (int i = 0; i < kittens.Length; i++) { kittens[i].Kill(); }

Sometimes you kill them all.