1.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
KLASA ZA 2:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication10
{
    class matrixgenerator
    {
        private static matrixgenerator instance;
        private Random generator;
        private matrixgenerator()
        {
            this.generator = new Random();
        }
        public static matrixgenerator GetInstance()
        {
            if (instance == null)
            {
                instance = new matrixgenerator();
            }
            return instance;
        }
        public int NextInt()
        {
            return this.generator.Next();
        }
        public int NextInt(int upperBound)
        {
            return this.generator.Next(upperBound);
        }
        public int NextInt(int lowerBound, int upperBound)
        {
            return this.generator.Next(lowerBound, upperBound);
        }
        public double[][] creatematrix(int broj_redaka,int broj_stupaca)
        {
            double[][] matrix = new double[broj_redaka][];
            for (int i = 0; i < 5; i++)
            {
                matrix[i] = new double[broj_stupaca];
            }
            for(int i=0;i<broj_redaka;i++)
            {
                for(int j=0;j<broj_stupaca;j++)
                {
                    matrix[i][j] = this.generator.NextDouble();
                }
            }
            return matrix;
        }
    }
}

KLASA ZA 1:
namespace ConsoleApplication10
{
    class Dataset : Prototype
    {
        private List<List<string>> data; //list of lists of strings
        public Dataset()
        {
            this.data = new List<List<string>>();
        }
        public Dataset(string filePath) : this()
        {
            this.LoadDataFromCSV(filePath);
        }
        public void LoadDataFromCSV(string filePath)
        {
            using (System.IO.StreamReader reader = new System.IO.StreamReader(filePath))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    List<string> row = new List<string>();
                    string[] items = line.Split(',');
                    foreach (string item in items)
                    {
                        row.Add(item);
                    }
                    this.data.Add(row);
                }
            }
        }
        public IList<List<string>> GetData()
        {
            return
           new System.Collections.ObjectModel.ReadOnlyCollection<List<string>>(data);
        }
        public void ClearData()
        {
            this.data.Clear();
        }

        public Prototype Clone()
        {
            Dataset lista = new Dataset();
            for(int i=0;i<this.data.Count;i++)
            {
                lista.data.Add(new List<string>());
                 for(int j=0;j<data[i].Count;j++)
                    lista.data[i].Add(this.data[i][j]);
            }
            return (Prototype)this.MemberwiseClone();
            return lista;
        }
    }
}
MAIN:
namespace ConsoleApplication10
{
    class Program
    {
        public static void Print(Dataset DATA)
        {
            for (int i = 0; i < DATA.GetData().Count; i++)
            {

                for (int j = 0; j < DATA.GetData()[i].Count; j++)
                {
                    Console.Write(DATA.GetData()[i][j] + ", ");
                }
                Console.WriteLine();

            }
        }
        static void Main(string[] args)
        {
            Dataset DATA = new Dataset("CSV.txt");
            Dataset CLONE = (Dataset)DATA.Clone();
            Print(DATA);
            Console.WriteLine();
            Print(CLONE);


            Dataset lista = new Dataset();
            matrixgenerator generatormatrica =  matrixgenerator.GetInstance();

            double[][] randmat = generatormatrica.creatematrix(5, 4);

            for (int i = 0; i < randmat.Length; i++)
            {
                for (int j = 0; j < randmat[i].Length; j++)
                {
                    Console.Write(randmat[i][j] +" ");
                }
                Console.WriteLine();
            }
        }

    }
}