How to iterate through two collections of the same length using a single foreach

Question

I know this question has been asked many times before but I tried out the answers and they don\'t seem to work.

I have two lists of the same length but not the same

Answer 1

You can wrap the two IEnumerable<> in helper class:

var nums = new []{1, 2, 3};
var strings = new []{"a", "b", "c"};

ForEach(nums, strings).Do((n, s) =>
{
  Console.WriteLine(n + " " + s);
});

//-----------------------------

public static TwoForEach ForEach(IEnumerable a, IEnumerable b)
{
  return new TwoForEach(a, b);   
}

public class TwoForEach
{
  private IEnumerator a;
  private IEnumerator b;

  public TwoForEach(IEnumerable a, IEnumerable b)
  {
    this.a = a.GetEnumerator();
    this.b = b.GetEnumerator();
  }

  public void Do(Action action)
  {
    while (a.MoveNext() && b.MoveNext())
    {
      action.Invoke(a.Current, b.Current);
    }
  }
}