how to create a notepad using c#

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 NotePad
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {   // This is where the code for the button click of "New" is going to go.
            SaveFileDialog sfd = new SaveFileDialog();
            DialogResult dr = MessageBox.Show("Do you want to save the file", "save", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (dr.Equals(DialogResult.Yes)) //Statement that execute when user click on yes button
            {
                string filename = sfd.FileName;
                String filter = "Text Files|*.txt|All Files|*.*";
                sfd.Filter = filter;

                sfd.Title = "Save";

                if (sfd.ShowDialog(this) == DialogResult.OK)
                {

                    //Write all of the text in txtBox to the specified file


                    System.IO.File.WriteAllText(filename, richTextBox1.Text);



                }

                else
                {

                    //Return

                    return;

                }

            }
            else
            {
                richTextBox1.Clear();
            }
        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            DialogResult dr = MessageBox.Show("Do you want to save the file", "save", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            //Declare open as a new OpenFileDailog
            OpenFileDialog open = new OpenFileDialog();
            //Set the Filename of the OpenFileDailog to nothing
            open.FileName = "";
            //Declare filename as a String equal to the OpenFileDialog's FileName
            String filename = open.FileName;
            //Declare filter as a String equal to our wanted OpenFileDialog Filter
            String filter = "Text Files|*.txt|All Files|*.*";
            //Set the OpenFileDialog's Filter to filter
            open.Filter = filter;
            //Set the title of the OpenFileDialog to Open
            open.Title = "Open";
            //Show the OpenFileDialog
            if (open.ShowDialog(this) == DialogResult.OK)
            {

                sfd.Filter = filter;

                sfd.Title = "Save";

                if (sfd.ShowDialog(this) == DialogResult.OK)
                {

                    //Write all of the text in txtBox to the specified file


                    System.IO.File.WriteAllText(filename, richTextBox1.Text);



                }

                else
                {

                    //Return

                    return;

                }
            }
            else
            {
                //Return
                return;
            }
        }

        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {    //Declare save as a new SaveFileDailog

            SaveFileDialog sw = new SaveFileDialog();

            //Declare filename as a String equal to the SaveFileDialog's FileName

            string filename = sw.FileName;

            //Declare filter as a String equal to our wanted SaveFileDialog Filter

            String filter = "Text Files|*.txt|All Files|*.*";

            //Set the SaveFileDialog's Filter to filter

            sw.Filter = filter;

            //Set the title of the SaveFileDialog to Save

            sw.Title = "Save";

            //Show the SaveFileDialog

            if (sw.ShowDialog(this) == DialogResult.OK)
            {

                //Write all of the text in txtBox to the specified file


                System.IO.File.WriteAllText(filename, richTextBox1.Text);



            }

            else
            {

                //Return

                return;

            }

        }





        private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //Declare save as a new SaveFileDailog

            SaveFileDialog sw = new SaveFileDialog();

            //Declare filename as a String equal to the SaveFileDialog's FileName

            string filename = sw.FileName;

            //Declare filter as a String equal to our wanted SaveFileDialog Filter

            String filter = "Text Files|*.txt|All Files|*.*";

            //Set the SaveFileDialog's Filter to filter

            sw.Filter = filter;

            //Set the title of the SaveFileDialog to Save

            sw.Title = "Save";

            //Show the SaveFileDialog

            if (sw.ShowDialog(this) == DialogResult.OK)
            {

                //Write all of the text in txtBox to the specified file



                System.IO.File.WriteAllText(filename, richTextBox1.Text);


            }

            else
            {

                //Return

                return;

            }
        }

        private void exitToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            //statement that execute on click of exit button   
            //and chekcing whether textbox modified or not if modified          
            //then prompt user to save or not          
            if (richTextBox1.Modified == true)
            {
                DialogResult dr = MessageBox.Show("Do you want to save the file before exiting", "unsaved file", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (dr == DialogResult.Yes)
                {
                    string filename = sfd.FileName;
                    String filter = "Text Files|*.txt|All Files|*.*";
                    sfd.Filter = filter;
                    sfd.Title = "Save";

                    if (sfd.ShowDialog(this) == DialogResult.OK)
                    {

                        //Write all of the text in txtBox to the specified file


                        System.IO.File.WriteAllText(filename, richTextBox1.Text);



                    }

                    else
                    {

                        //Return

                        return;

                    }
                }
                else
                {
                    richTextBox1.Modified = false;
                    Application.Exit();
                }
            }
        }

        private void cutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Cut();
        }

        private void copyToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Copy();
        }

        private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Paste();
        }

        private void selectAllToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.SelectAll();
        }
        //Declare prntDoc as a new PrintDocument
        System.Drawing.Printing.PrintDocument prntDoc = new System.Drawing.Printing.PrintDocument();

        private void printToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //Declare print as a new PrintDialog
            PrintDialog print = new PrintDialog();
            //Declare prntDoc_PrintPage as a new EventHandler for prntDoc's Print Page
            prntDoc.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(prntDoc_PrintPage);
            //Set prntDoc to the PrintDialog's Document
            print.Document = prntDoc;
            //Show the PrintDialog
            if (print.ShowDialog(this) == DialogResult.OK)
            {
                //Print the Page
                prntDoc.Print();
            }
        }
        private void prntDoc_PrintPage(Object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            //Declare g as Graphics equal to the PrintPageEventArgs Graphics
            Graphics g = e.Graphics;
            //Draw the Text in txtBox to the Document
            g.DrawString(richTextBox1.Text, richTextBox1.Font, Brushes.Black, 0, 0);
        }

        private void prientPriewevToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //Declare preview as a new PrintPreviewDialog
            PrintPreviewDialog preview = new PrintPreviewDialog();
            //Declare prntDoc_PrintPage as a new EventHandler for prntDoc's Print Page
            prntDoc.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(prntDoc_PrintPage);
            //Set the PrintPreview's Document equal to prntDoc
            preview.Document = prntDoc;
            //Show the PrintPreview Dialog
            if (preview.ShowDialog(this) == DialogResult.OK)
            {
                //Generate the PrintPreview
                prntDoc.Print();
            }
        }
        private void undoToolStripMenuItem_Click(object sender, EventArgs e)
        {
           
            richTextBox1.Undo();
        }

        private void wordWrapToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //performing wordwrap operation         
            if (wordWrapToolStripMenuItem.Checked == false)
            {
                wordWrapToolStripMenuItem.Checked = true;
                richTextBox1.WordWrap = true;
            }
            else
            {
                wordWrapToolStripMenuItem.Checked = false;
                richTextBox1.WordWrap = false;
            }
        }
        private void redoToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Redo();
            
        }

        private void fontToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FontDialog fontDialog = new FontDialog();
            fontDialog.ShowColor = true;
            fontDialog.ShowEffects = true;
            if (fontDialog.ShowDialog(this) == DialogResult.OK)
            {
                richTextBox1.ForeColor = fontDialog.Color;
                richTextBox1.Font = fontDialog.Font;
            }

        }

        private void findToolStripMenuItem_Click(object sender, EventArgs e)
        {
            findform f = new findform();
            f.ShowDialog();
            if (Text != "")
            {
                richTextBox1.Find(Text);
            }
            
        }


        private void statusbarToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //statuslabel1.Text = "Cols " + richTextBox1.Text.Length;    
            if (statusbarToolStripMenuItem.Checked == false)
            {
                statusbarToolStripMenuItem.Checked = true;

            }
            else
            {

                statusbarToolStripMenuItem.Checked = false;

            }
        }


        private void dateTimeToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            richTextBox1.Text = System.DateTime.Now.ToString();
        }

        private void deleteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Clear();

        }

        private void goToToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void pageSetupToolStripMenuItem_Click(object sender, EventArgs e)
        {
           
        }
}
But I did not write find,find next and pagesetup
 
please help me