C#Mines(布雷)代碼

本文給出一個C# Mines(布雷)的 代碼，新手研究一下吧。
    以下是引用片段：
    using System.Collections;
    using System.IO;
    using System;
    namespace com.Mines
    {
    class SearchingMines
    {
    public ArrayList list = new ArrayList();
    public int[,] mines = new int[10, 10];
    static void Main(string[] args)
    {
    SearchingMines sm = new SearchingMines();
    sm.initMines();
    sm.HidenMines();
    sm.FillInOtherNumber();
    sm.display();
    // sm.SaveTxt();
    }
    public void initMines()
    {
    for (int i = 0; i < this.mines.GetLength(0); i++)
    {
    for (int j = 0; j < this.mines.GetLength(1); j++)
    {
    this.mines[i, j] = 0;
    list.Add(this.mines[i, j]);
    }
    }
    }
    public void HidenMines()
    {
    Random r = new Random();
    for (int i = 0; i < 9; i++)
    {
    int count = this.list.Count;
    int number = r.Next(count);
    int row = number / 10;
    int column = number % 10;
    this.mines[row, column] = 9;
    this.list.RemoveAt(this.mines[row, column]);
    }
    }
    public void FillInOtherNumber()
    {
    try
    {
    for (int i = 0; i < this.mines.GetLength(0); i++)
    {
    for (int j = 0; j < this.mines.GetLength(1); j++)
    {
    int left = j - 1;
    int right = j + 1;
    int top = i - 1;
    int bottom = i + 1;
    if (this.mines[i, j] != 9)
    {
    if(top>=0 && left>=0)//左邊和上邊
    {
    if (this.mines[top, left] == 9)//判斷左上方是否為9
    {
    mines[i,j] += 1;
    }
    }
    if(top>=0 && right<10)//右邊和上邊
    {
    if (this.mines[top, right] == 9)//判斷該點的右上方是否
    {
    mines[i,j] += 1;
    }
    }
    if(top>=0)//最上邊
    {
    if (this.mines[top, j] == 9)//上邊的那個是否為9
    {
    mines[i,j] += 1;
    }
    }
    if(left>=0)//最左邊
    {
    if (this.mines[i, left] == 9)//看左邊那個是否為9
    {
    mines[i,j] += 1;
    }
    }
    if(right<10)//最右邊
    {
    if (this.mines[i, right] == 9)//看右邊是否為9
    {
    mines[i,j] += 1;
    }