epilepsy generator 2.0 pinakes me GetLength

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main()
        {
            Random rnd = new Random();

            int[,] array = new int[rnd.Next(0, 100000), rnd.Next(0, 100000)];

            for (int k = 0; k < array.GetLength(0); k++)
            {
                for (int l = 0; l < array.GetLength(1); l++)
                {
                    array[k, l] = rnd.Next();
                    Console.ForegroundColor = (ConsoleColor)rnd.Next(0, 14);
                    Console.Write("[{0}, {1}] = {2}", k, l, array[k, l]);
                }
            }
        }
    }
}