Simple little extension method / wrapper to support Zip() function on strings

ZipStrings.cs

using System.Linq;
using System.Collections;
using System.Collections.Generic;

static class ZipStringExtension
{
	public static IEnumerable<List<char>> Zip(this string str1, string str2)
	{
		/* Zips two strings together, so that they may be iterated over.
		*  Wrapper for Enumerable.Zip() method; convenient because it converts strings to lists and specifies to return zipped element as an
		*  IEnumerable containing List<char>'s of the two chars for each index
		*  Returns an IEnumerable containing Lists of two chars each.
		*  The function can be called and iterated over like this:
		*  foreach (List<char> chars in Zip(str1, str2)
		 {
			 char char1 = chars[0];         char char2 = chars[1];
		 }
		*/
		return str1.ToList().Zip(str2.ToList(), (char1, char2) => new List<char>() { char1, char2 });
	}
}

ZipStringsExample.cs

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

static class Program {
	
	public static IEnumerable<List<char>> Zip(this string str1, string str2)
	{
		/* Zips two strings together, so that they may be iterated over.
		*  Wrapper for Enumerable.Zip() method; convenient because it converts strings to lists and specifies to return zipped element as an
		*  IEnumerable containing List<char>'s of the two chars for each index
		*  Returns an IEnumerable containing Lists of two chars each.
		*  The function can be called and iterated over like this:
		*  foreach (List<char> chars in Zip(str1, str2)
		 {
			 char char1 = chars[0];         char char2 = chars[1];
		 }
		*/
		return str1.ToList().Zip(str2.ToList(), (char1, char2) => new List<char>() { char1, char2 });
	}
	
	static void Main()
	{
		// Demonstrates example usage of the string.Zip() extension method
		string str1 = "apple";
		string str2 = "banana";
		List<List<char>> zippedChars = Zip(str1, str2).ToList();
		for (int charindex = 0; charindex < zippedChars.Count; charindex++)
		{
			List<char> charsatindex = zippedChars[charindex];
			Console.WriteLine($"Chars at index {charindex}: char from str1 is {charsatindex[0]}, char from str2 is {charsatindex[1]}");
		}
		
		/* Output:
		
		Chars at index 0: char from str1 is a, char from str2 is b
		Chars at index 1: char from str1 is p, char from str2 is a
		Chars at index 2: char from str1 is p, char from str2 is n
		Chars at index 3: char from str1 is l, char from str2 is a
		Chars at index 4: char from str1 is e, char from str2 is n
		
		*/
	}
}