How do I create a single list of object pairs from two lists in C#?

Question

I have two lists of objects. List A and List B. I need to create List C which combines List A and List B into pairs. For example:

List A
object a1
object a2
         


        

Answer 1

.NET Core 3 has a new overload for the Zip method. It takes two IEnumerables and creates one IEnumerable containing value tuples with the elements from both input IEnumerables.

IEnumerable<(A a, B b)> pairs = listA.Zip(listB);

You can use the result in multiple ways:

foreach((A a, B b) in pairs)
{
    // Do something with a and b
}

foreach(var (a, b) in pairs)
{
    // Do something with a and b
}

foreach(var pair in pairs)
{
    A a = pair.a;
    B b = pair.b;
}