How would i create Save button for this ?

Here is the code FULL code:

Code:

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;
using System.IO;
namespace csharp
{
    public partial class Form1 : Form
    {
	    public Form1()
	    {
		    InitializeComponent();
	    }
	    private void button1_Click(object sender, EventArgs e)
	    {
		    OpenFileDialog ofd = new OpenFileDialog();
		    ofd.Title = "Open profile/gamesave";
		    if (ofd.ShowDialog() == DialogResult.OK)
		    {
			    BinaryReader br = new BinaryReader(File.Open(ofd.FileName, FileMode.Open));
			    br.BaseStream.Position = 0x0; 
			    textBox1.Text = ToASCII(br.ReadBytes(4));
			    br.BaseStream.Position = 0x360; 
			    textBox2.Text = ToHex(br.ReadBytes(8));
			    br.BaseStream.Position = 0x371; 
			    textBox3.Text = ToHex(br.ReadBytes(8));
			    br.BaseStream.Position = 0x3FD; 
			    textBox4.Text = ToHex(br.ReadBytes(14));
			    br.BaseStream.Position = 0x36C; 
			    textBox5.Text = ToHex(br.ReadBytes(5));
			    br.BaseStream.Position = 0x412; 
			    textBox6.Text = ToUnicode(br.ReadBytes(40));
			    br.BaseStream.Position = 0x1692; 
			    textBox7.Text = ToUnicode(br.ReadBytes(70));
			    br.BaseStream.Position = 0x20; 
			    textBox8.Text = ToASCII(br.ReadBytes(8));
			    br.BaseStream.Position = 0x1F; 
			    textBox9.Text = ToHex(br.ReadBytes(1));
			    br.BaseStream.Position = 0x0; 
			    textBox10.Text = ToHex(br.ReadBytes(8));
			    br.BaseStream.Position = 0xC140; 
			    textBox11.Text = ToASCII(br.ReadBytes(12));
			    br.BaseStream.Position = 0x1C2A1; 
			    textBox12.Text = ToUnicode(br.ReadBytes(44));
			    MessageBox.Show("File Succesfully Loaded", "", MessageBoxButtons.OK, MessageBoxIcon.Information);

			    br.Close();
			   

		    }
	    }
	    private string ToHex(byte[] buf)
	    {
		    return BitConverter.ToString(buf).Replace("-", "");
	    }
	    private string ToASCII(byte[] buf)
	    {
		    return Encoding.ASCII.GetString(buf);
	    }
	    private string ToUnicode(byte[] buf)
	    {
		    return Encoding.Unicode.GetString(buf);
	    }
	    private void button2_Click(object sender, EventArgs e)
	    {
	    }

    }
}

So i would want button2_click to save all changes what are made to the values.

Thanks !