Listing the methods in a .cs class listing

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;
using System.Drawing.Printing;

namespace MethodExtractor
{
    public partial class MainWindow : Form
    {
        private string[] startStrs = new string[] { "public", "private", "protected", "internal" };
        private List<string> Methods = new List<string>();
        private string FName = string.Empty;
        private PrintDocument PrintDoc;
        private SaveFileDialog saveFile_Dlg;
        private Font printFont = new Font("Times New Roman", 12);

        public MainWindow()
        {
            InitializeComponent();
            saveFile_Dlg = new SaveFileDialog();
            //Create a PrintDocument object
            PrintDoc = new PrintDocument();
            //Add PrintPage event handler to the document to print
            PrintDoc.PrintPage += new PrintPageEventHandler(printAPage);
        }

        /// <summary>
        /// str is assumed to be trimmed
        /// </summary>
        /// <param name="str"></param>
        /// <param name="startStrs">the strings were str has to start with to return true</param>
        /// <returns></returns>
        private bool OKtoProcess(string str, string[] startStrs)
        {
            foreach(string item in startStrs)
            {
                if (str.StartsWith(item))
                {
                    return true;
                }
            }
            return false;
        }

        private void OpenFileBtn_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                listBox1.Items.Clear(); 
                FName = openFileDialog1.SafeFileName; //just the name, not the whole path
                StreamReader reader = new StreamReader(openFileDialog1.FileName);
                string line = String.Empty;
                string writeStr = String.Empty;
                int indx = 0;
                while ((line = reader.ReadLine()) != null)
                {
                    line = line.TrimStart(new char[] { ' ', '\t' });
                    if (OKtoProcess(line, startStrs))
                    {
                        indx = line.IndexOf(')');
                        if (indx != -1)
                        {
                            writeStr = line.Substring(0, indx + 1);
                            Methods.Add(writeStr);
                            listBox1.Items.Add(writeStr);
                        }
                    }
                }
                reader.Close();
            }
        }

        private void SaveListBtn_Click(object sender, EventArgs e)
        {
            saveFile_Dlg.Filter = "C sharp file|*.cs| Text file|*.txt";
            saveFile_Dlg.Title = "Save a method list";
            saveFile_Dlg.ShowDialog();
            if (saveFile_Dlg.ShowDialog() == DialogResult.OK)
            {
                bool append = true;
                string fullPath = saveFile_Dlg.FileName;
                StreamWriter writer = new StreamWriter(fullPath, append);
                for (int i = 0; i < listBox1.Items.Count; i++)
			    {
                    writer.WriteLine(listBox1.Items[i]);
			    }
                writer.Close();               
            }           
        }

        // Called by the Print method, print some tekst lines from a list
        private void printAPage(object sender, PrintPageEventArgs PE)
        {
            int count = 1;
            float yPos = 0f;
            float leftMargin = PE.MarginBounds.Left;
            float topMargin = PE.MarginBounds.Top;
            float fontHeight = printFont.GetHeight(PE.Graphics);
            float linesPerPage = (PE.MarginBounds.Height / fontHeight) - 1;
            PE.Graphics.DrawString("********* Methods in file : " + FName,
                    printFont, Brushes.Black, leftMargin, topMargin, new StringFormat());
            while (count < linesPerPage)
            {
                yPos = topMargin + count * fontHeight;
                if (count >= listBox1.Items.Count) break;
                PE.Graphics.DrawString( listBox1.Items[count].ToString(), 
                    printFont, Brushes.Black, leftMargin, yPos, new StringFormat());
                count++;
            }
            if (count < listBox1.Items.Count) PE.HasMorePages = true;
        }

        private void PrintPreviewBtn_Click(object sender, EventArgs e)
        {
            PrintPreviewDialog printPreviewDlg = new PrintPreviewDialog();
            ((Form)printPreviewDlg).WindowState = FormWindowState.Maximized;
            printPreviewDlg.Document = PrintDoc; //give the PrintDoc to the preview dialog
            printPreviewDlg.Show(); 
        }

        private void PrintBtn_Click(object sender, EventArgs e)
        {
            //Print the document, fires the PrintPage eventhandler
            // prints a page.
            PrintDoc.Print();
        }
    }
}