Can you name C# 7 Tuple items inline?

Question

By default, when using C# 7 tuples, the items will named like Item1, Item2, and so on.

I know you can name tuple items being returned by a method. But can you do the same inline code, such as in the following example?

foreach (var item in list1.Zip(list2, (a, b) => (a, b)))
{
    // ...
}

In the body of the foreach, I would like to be able to access the tuple at the end (containing a and b) using something better than Item1 and Item2.

Answer 1

Yes, you can, by deconstructing the tuple:

foreach (var (boo,foo) in list1.Zip(list2, (a, b) => (a, b)))
{
    //...
    Console.WriteLine($"{boo} {foo}");
}

or

foreach (var item in list1.Zip(list2, (a, b) => (a, b)))
{
    //...
    var (boo,foo)=item;
    Console.WriteLine($"{boo} {foo}");
}

Even if you named the fields when declaring the tuple, you'd need the deconstruction syntax to access them as variables:

foreach (var (boo,foo) in list1.Zip(list2, (a, b) => (boo:a, foo:b)))
{
    Console.WriteLine($"{boo} {foo}");
}

If you want to access the fields by name without deconstructing the tuple, you'll have to name them when the tuple is created:

foreach (var item in list1.Zip(list2, (a, b) => (boo:a, foo:b)))
{
    Console.WriteLine($"{item.boo} {item.foo}");
}