private void Form1_Load(object sender, EventArgs e)
    {
        //fs.Read(read, 0, len);
    }
    #endregion

    #region Defaults
    OpenFileDialog open = new OpenFileDialog();

    static int len = 1000000000;
    byte[] read = new byte[len];
    static string path = "";
    int index = 0;
    int count = -1;
    List<int> saveSearch = new List<int>();
    #endregion

    #region output funcs
    public int findBytes(byte[] haystack, byte[] needle, int start_index)
    {
        int len = needle.Length;
        int limit = haystack.Length - len;
        for (int i = start_index; i <= limit; i++)
        {
            int k = 0;
            for (; k < len; k++)
            {
                if (needle[k] != haystack[i + k]) break;
            }
            if (k == len) return i;
        }
        return -1;
    }
    private string DebuggerStr(byte[] numArray, int start)
    {
        try
        {
            StringBuilder stringBuilder = new StringBuilder();
            StringBuilder stringBuilder1 = new StringBuilder();
            for (int i = 0; i < (int)numArray.Length; i++)
            {
                int num2 = numArray[i + start];
                if (num2 > Convert.ToInt32(0x19) && num2 < Convert.ToInt32(0x7F))
                {
                    stringBuilder1.Append((char)numArray[i + start]);
                }
                else if (num2 == Convert.ToInt32(0x0A))
                {
                    break;
                }
                else
                {
                    stringBuilder1.Append(".");
                }

                stringBuilder.Append(string.Concat(stringBuilder1.ToString()));
                stringBuilder1 = new StringBuilder();
            }
            return stringBuilder.ToString();
        }
        catch
        {
            return "";
        }
    }
    #endregion

    #region Button Controls

    private void button2_Click(object sender, EventArgs e)
    {
        if (count != 0)
        {
            string save = DebuggerStr(read, saveSearch[--count]);
            textBox2.Text = save;
        }
    }
    private void button3_Click(object sender, EventArgs e)
    {
        byte[] search = Encoding.ASCII.GetBytes(textBox1.Text);
        index = findBytes(read, search, index);

        if (index != -1)
        {
            ++count;
            saveSearch.Add(index);
            string save = DebuggerStr(read, saveSearch[count]);
            textBox2.Text = save;
            index += search.Length;
        }
        else
        {
            resetSearch();
            textBox2.Text = "No Results";
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        if (open.ShowDialog() == DialogResult.OK)
        {
            path = open.FileName;
            FileStream fs = new FileStream(path, FileMode.Open);
            fs.Read(read, 0, len);
            resetSearch();
            Text = "Text Searcher - File Opened: " + path;
        }
    }

    private void button4_Click(object sender, EventArgs e)
    {
        resetSearch();
    }
    #endregion

    #region Other funcs
    private void resetSearch()
    {
        textBox2.Clear();
        saveSearch.Clear();
        index = 0;
        count = -1;
    }

    private void textBox1_TextChanged(object sender, EventArgs e)
    {
        index = 0;
    }