EQVersion - Joey's 1st Grade Test

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

namespace EQVersion
{
    public partial class EQVersionForm : Form
    {
        public EQVersionForm()
        {
            InitializeComponent();
        }

        private void quitButton_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void EQVersionForm_Shown(object sender, EventArgs e)
        {
            exeLocationTextBox.Text = Path.Combine(Directory.GetCurrentDirectory(), "eqgame.exe");
            if (!File.Exists(exeLocationTextBox.Text))
            {
                SelectFile();
            }
            else
            {
                ReadAndDisplayVersion();
            }
        }

        private void SelectFile()
        {
            this.Enabled = false;
            exeOpenFileDialog.InitialDirectory = exeLocationTextBox.Text;
            DialogResult drResult = exeOpenFileDialog.ShowDialog();
            if (drResult != DialogResult.OK)
                Application.Exit();
            exeLocationTextBox.Text = exeOpenFileDialog.FileName;
            ReadAndDisplayVersion();
            this.Enabled = true;
        }

        private void exeLocationButton_Click(object sender, EventArgs e)
        {
            SelectFile();
        }

        private void ReadAndDisplayVersion()
        {
            try
            {
                FileStream fs = File.OpenRead(exeOpenFileDialog.FileName);
                byte[] buffer = new byte[fs.Length];
                int bytesRead = fs.Read(buffer, 0, buffer.Length);
                fs.Close();
                if (bytesRead > 0)
                {
                    string tmpBuffer = ASCIIEncoding.ASCII.GetString(buffer);
                    int startLoc = tmpBuffer.IndexOf("Client Version: %s %s") + 48;
                    versionTextBox.Text = tmpBuffer.Substring(startLoc);
                    startLoc += versionTextBox.TextLength + 1;
                    versionTextBox.Text += " " + tmpBuffer.Substring(startLoc);
                }
                else
                {
                    versionTextBox.Text = "Unknown";
                }
            }
            catch (Exception ex)
            {
                versionTextBox.Text = ex.Message;
            }
        }
    }
}