How do I add two lists in Linq so addedList[x] = listOne[x] + listTwo[x]?

Question

I want to add two lists of a numeric type such that addedList[x] = listOne[x] + listTwo[x]

The output of the list needs to be a Generic.IEnumerable that I can use i

Answer 1

It sounds like you want a function like this:

public static IEnumerable SumIntLists( 
    this IEnumerable first, 
    IEnumerable second) 
{
    using(var enumeratorA = first.GetEnumerator()) 
    using(var enumeratorB = second.GetEnumerator()) 
    { 
        while (enumeratorA.MoveNext()) 
        {
            if (enumeratorB.MoveNext())
                yield return enumeratorA.Current + enumeratorB.Current;
            else
                yield return enumeratorA.Current;
        }
        // should it continue iterating the second list?
        while (enumeratorB.MoveNext())
            yield return enumeratorB.Current;
    } 
}