using System;

public class Program

{

    public static void Main(string[] args)

    {

        int[,] matrix=new int[5,5];

        Random rnd = new Random();

        for (int i= 0; i<matrix.GetLength(0);i++)

        {

            for (int j = 0; j<matrix.GetLength(1);j++)

            {

                matrix[i,j] = rnd.Next(0,100);

                Console.Write(i+ rnd.Next(0,100)+ "\t");

            }                  

            Console.WriteLine();                

        }

        Console.ReadLine();

    }   

}

​