Zip an LINQ extension

4.js

public void Zip()
{
    // An int array with 7 elements.
    IEnumerable < int > numbers = new []
    {
        1, 2, 3, 4, 5, 6, 7
    };
    // A char array with 6 elements.
    IEnumerable < char > letters = new []
    {
        'A', 'B', 'C', 'D', 'E', 'F'
    };
    var union = numbers.Zip(letters);
}

public void Manual()
{
    var numbers = new []
    {
        1, 2, 3, 4, 5, 6, 7
    };
    // A char array with 6 elements.
    var letters = new []
    {
        'A', 'B', 'C', 'D', 'E', 'F'
    };

    //for need to be done on the lower element 
    var howManyLoops = letters.Count() > numbers.Count() ? letters.Count() : numbers.Count();
    var l = new List < Tuple < char, int>> ();
    for (var i = 0; i < howManyLoops - 1; i++) {
        l.Add(Tuple.Create(letters[i], numbers[i]));
    }

}


public void ManualEnuberable()
{
    IEnumerable < int > numbers = new []
    {
        1, 2, 3, 4, 5, 6, 7
    };
    // A char array with 6 elements.
    IEnumerable < char > letters = new []
    {
        'A', 'B', 'C', 'D', 'E', 'F'
    };

    //for need to be done on the lower element 
    var howManyLoops = letters.Count() > numbers.Count() ? letters.Count() : numbers.Count();

    var l = new List < Tuple < char, int>> ();
    for (var i = 0; i < howManyLoops - 1; i++) {
        l.Add(Tuple.Create(letters.ElementAt(i), numbers.ElementAt(i)));
    }
}