К А

using System;

class TwoArray
{
    static void Main()
    {
        int[,] numbs = new int[3, 5];
        Random rand = new Random();

        int[,] numbs2 = new int[5, 3];

        for (int i = 0, z = 0; i < numbs.GetLength(0); i++)
        {
            for (int j = 0; j < numbs.GetLength(1); j++, z++)
            {
                numbs[i, j] = rand.Next(0, 100);
                Console.Write(numbs[i, j] + " ");
            }
            Console.WriteLine();
        }
        Console.WriteLine();
        
        for (int i = 0; i < numbs2.GetLength(0); i++)
        {
            for (int j = 0; j < numbs2.GetLength(1); j++)
            {
                numbs2[i, j] = numbs[j, i];
                Console.Write(numbs2[i, j] + " ");
            }
            Console.WriteLine();
        }
        Console.ReadKey();
    }
}