c# 甘蔗斗地主1.4存档修改器

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

namespace xiugaiqi
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            int score_xiaojing = Convert.ToInt32(textBox1.Text);
            int score_aku = Convert.ToInt32(textBox2.Text);
            int score_tiantian = Convert.ToInt32(textBox3.Text);

            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "JGO文件|*.JGO";
            ofd.FilterIndex = 1;

            if (ofd.ShowDialog() == DialogResult.OK)
            {
                change_values(ofd.FileName, 0x17, score_xiaojing);
                change_values(ofd.FileName, 0x33, score_aku);
                change_values(ofd.FileName, 0x4f, score_tiantian);
                label4.Text = "√";
                label5.Text = "√";
                label6.Text = "√";

            }

        }
        private void change_values(string filename,int postion,int values)
        {
            BinaryWriter bw = new BinaryWriter(File.OpenWrite(filename));
            int x = values;
            bw.BaseStream.Position = postion;  //0x17 小静的位置, 0X33 阿酷的位置, 0X4F 甜甜的位置
            bw.Write(x);
            bw.Close();
        }
    }
}