transpose a jagged array by linq

Transpose.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TransposeArray
{
    public static class MyClass
    {
        public static T[][] Transpose<T>(this T[][] jaggedArray)
        {
            var elemMin = jaggedArray.Select(x => x.Length).Min();
            return jaggedArray
                .SelectMany(x => x.Take(elemMin).Select((y, i) => new { val = y, idx = i }))
                .GroupBy(x => x.idx, x => x.val, (x, y) => y.ToArray()).ToArray();
        }

        public static IEnumerable<IEnumerable<T>> Transpose<T>(this IEnumerable<IEnumerable<T>> stream, bool forceElemToArray = false)
        {
            return stream
                .SelectMany(x => x.Select((y, i) => new { val = y, idx = i }))
                .GroupBy(x => x.idx, x => x.val, (x, y) => forceElemToArray ? y.ToArray() : y);
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var values = new [] { 
                new [] {1,2,3,4}, 
                new [] {5,6,7,8}, 
                new [] {9,10,11,12} 
            };

            foreach (var item in values)
            {
                Console.WriteLine(string.Join(",", item));        
            }
            Console.WriteLine("");

            foreach (var item in values.Transpose())
            {
                Console.WriteLine(string.Join(",", item));        
            }
            Console.WriteLine("");

            var values2 = new[] { 
                new [] {1,2,3,4}, 
                new [] {5,6}, 
                new [] {9,10,11,12} 
            };

            foreach (var item in values2)
            {
                Console.WriteLine(string.Join(",", item));
            }
            Console.WriteLine("");

            foreach (var item in values2.Transpose())
            {
                Console.WriteLine(string.Join(",", item));
            }
            Console.WriteLine("");

            var values3 = Enumerable.Repeat(Enumerable.Range(0, 5), 3);
            
            foreach (var item in values3.Transpose())
            {
                Console.WriteLine(string.Join(",", item));
            }
            Console.WriteLine("");
        }
    }
}