C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace William_Cappoli_IT466_Unit_3_Project
{

    public partial class frmMain : Form
    {
        // Array to hold numbers 000 - 999 and count occurance
        int[,] lotteryNumbers = new int[1000, 2];
        // Array to hold 10 most frequent numbers
        int[,] maxNumbers = new int[10, 2];
        // Array to hold l0 least frequent numbers
        int[,] minNumbers = new int[10, 2];

        // stores most recently generated number
        int currentNum;

        // random number generator
        Random randomNumbers = new Random();

        public frmMain()
        {
            InitializeComponent();
            fillLotteryArray();
        }

        private void btnGenerate_Click(object sender, EventArgs e)
        {
            fillMinNumbersArray();

            // clears out labels displaying minimum and maximum number lists
            lblDisplayMostCommon.Text = "";
            lblDisplayLeastCommon.Text = "";

            for (int i = 0; i < 10000; ++i)
            {
                currentNum = randomNumbers.Next(999);

                for (int j = 0; j < 1000; ++j)
                {
                    if (lotteryNumbers[j, 0] == currentNum)
                    {
                        lotteryNumbers[i, 1]++;
                    }
                }
                maxNumber();
                minNumber();

            }
        }  // btnGenerate_Click method

        private void fillLotteryArray() //Fill lottery number array with values 000 - 999
        {
            for (int i = 0; i < 1000; ++i)
            {
                lotteryNumbers[i, 0] = i;
            }
        }  // end fillLotteryArray()

        private void fillMinNumbersArray() //Fill minimum numbers array with value 5000
        {
            for (int i = 0; i < 10; ++i)
            {
                minNumbers[i, 1] = 5000;
            }
        }  // fillMinNumbersArray()

        public void maxNumber() // Find 10 most frequent numbers
        {
            for (int j = 0; j < 1000; ++j) // Loop for all 1000 lottery numbers
            {
                for (int i = 0; i < 10; ++i) // Loop for the 10 maximum numbers
                {
                    if (lotteryNumbers[j, 1] > maxNumbers[i, 1]) // Check if there is a more fequent number than the one stored at each index
                    {
                        for (int h = 9; h > i; --h) // Starting with index 9, store previous index value until you reach the index that will store the new value
                        {
                            maxNumbers[h, 1] = maxNumbers[h - 1, 1];
                            maxNumbers[h, 0] = maxNumbers[h - 1, 0];
                        }
                        maxNumbers[i, 1] = lotteryNumbers[j, 1]; // Store new values at slated index
                        maxNumbers[i, 0] = lotteryNumbers[j, 0];
                        i = 10;
                    }
                }
            }

            for (int i = 0; i < 10; ++i) // Display each number and its frequency
            {
                lblDisplayMostCommon.Text += maxNumbers[i, 0].ToString("000") + "     " + Convert.ToString(maxNumbers[i, 1]) + "\n";
            }
        }  // end maxNumber method

        public void minNumber() // Find 10 least frequent numbers
        {
            for (int j = 0; j < 1000; ++j) // Loop for all 1000 lottery numbers
            {
                for (int i = 0; i < 10; ++i) // Loop for the 10 minimum numbers
                {
                    if (lotteryNumbers[j, 1] > 0 & lotteryNumbers[j, 1] < minNumbers[i, 1]) // Check if there is a less frequent number than the one stored at each index disregarding numbers that have not been drawn
                    {
                        for (int h = 9; h > i; --h) // Starting with index 9, store previous index value until you reach the index that will store the new value
                        {
                            minNumbers[h, 1] = minNumbers[h - 1, 1];
                            minNumbers[h, 0] = minNumbers[h - 1, 0];
                        }
                        minNumbers[i, 1] = lotteryNumbers[j, 1]; // Store new values at slated index
                        minNumbers[i, 0] = lotteryNumbers[j, 0];
                        i = 10;
                    }
                }
            }

            for (int i = 0; i < 10; ++i) // Display each number and its frequency
            {
                lblDisplayLeastCommon.Text += minNumbers[i, 0].ToString("000") + "     " + Convert.ToString(minNumbers[i, 1]) + "\n";
            }
        }  // end minNumbers method
    }  // form1 partial class
}  // end namespace