using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var lst1 = Enumerable.Range(1, 10);

        var lst2 = Enumerable.Range(11, 20);

        foreach (

            Tuple<int, int> pair 

            in lst1.Zip(lst2, (a, b) => new Tuple<int, int>(a, b))

        )

        {

            Console.WriteLine(pair);

        }

    }

}