Adding/summing two arrays

Question

I\'ve encountered a purely hypothetical problem which feels like it has an easy solution if I find the right linq method...

I have two arrays of ints and I know they are

Answer 1

IList first = new List { 2, 3, 4, 5 };
IList second = new List { 2, 3, 4, 5 };

var result = Enumerable.Zip(first, second, (a, b) => a + b);