NotePad C# code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.IO;

namespace Notepad
{
    public partial class Form1 : Form
    {
        int current = 0;
        static string text;
        static int check = 0;
        static int firstTime = 0;
        static string destination = "";
        string cutData, copyData, pasteData,deleteData,undoData;
        public Form1()
        {
            InitializeComponent();
        }

        public void save()
        {
            SaveFileDialog save = new SaveFileDialog();
            save.InitialDirectory = "D:";
            save.ShowHelp = true;
            save.RestoreDirectory = true;
            save.Title = "Save Notepad file";
            save.Filter = "Text Document (*.txt)|*.txt";
            if (save.ShowDialog() == DialogResult.OK)
            {
                using (StreamWriter write = new StreamWriter(save.FileName, true))
                {
                    write.Write(textBox1.Text);
                }
            }
            destination = save.FileName;
            changeName(destination);
        }
        public void changeName(string path)
        {
            char[] fileName;
            fileName = path.ToCharArray();
            path = "";
            for (int i = fileName.Length - 1; i >= 0; i--)
            {
                if (fileName[i] == '\\')
                {
                    for (int j = i + 1; j < fileName.Length; j++)
                    {
                        path += fileName[j];
                    }
                    break;
                }
            }
            this.Text = path;
        }

        public void exit()
        {
            if (current == 1)
            {
                wantToSave();
            }
            DialogResult exit;
            exit = MessageBox.Show("Are u sure u want to exit", "Exit", MessageBoxButtons.YesNo);
            if (DialogResult.Yes == exit)
            {
                MessageBox.Show("Thanks for using my Notepad", "Gooooooooooood bye");
                Application.ExitThread();
            }
        }

        public void wantToSave()
        {
            DialogResult saveVar;
            saveVar = MessageBox.Show("Do u want to save ur changes", "Save", MessageBoxButtons.YesNoCancel);
            if (DialogResult.Yes == saveVar)
            {
                save();
                textBox1.Text = "";
                this.Text = "Untitled - Notepad";
                current = 0;
            }
            if (DialogResult.No == saveVar)
            {
                textBox1.Text = "";
                this.Text = "Untitled - Notepad";
                current = 0;
            }
        }

        public void select()
        {
            Point po = new Point();
            if (statusBarToolStripMenuItem.Checked == true)
            {
                po.X = 0;
                po.Y = 240;
                statusStrip1.Visible = true;
                hScrollBar1.Location = po;
                hScrollBar1.Visible = true;
            }
            else
            {
                po.X = 0;
                po.Y = 262;
                statusStrip1.Visible = false;
                hScrollBar1.Location = po;
                hScrollBar1.Visible = true;
            }
        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // OPEN
            wantToSave();
            OpenFileDialog open = new OpenFileDialog();
            open.InitialDirectory="D:";
            open.Multiselect = true;
            open.RestoreDirectory = true;
            open.Title = "Open Notepad file";
            open.Filter = "Text Document (*.txt)|*.txt";
            if (open.ShowDialog() == DialogResult.OK)
            {
                string path = open.FileName;
                changeName(path);
            }
            using(StreamReader read=new StreamReader (open.FileName,false))
            {
                textBox1.Text = read.ReadToEnd(); 
            }
            timer1.Enabled = true;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // NEW
            if (current == 1)
            {
                wantToSave();
            }
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // EXIT
            exit();
        }
       
        private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // SAVE AS
            save();
        }

        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // SAVE
            if (firstTime == 0)
            {
                save();
            }
            else
            {
                using (StreamWriter write = new StreamWriter(destination, true))
                {
                    write.Write(textBox1.Text);
                }
            }
            firstTime++;
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            exit();
            e.Cancel = true;
        }

        private void fontToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (DialogResult.OK == fontDialog1.ShowDialog())
            {
                textBox1.Font = fontDialog1.Font;
                textBox1.ForeColor = fontDialog1.Color;
            }
        }

        private void wordWarpToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Point po = new Point();
            if (wordWarpToolStripMenuItem.Checked == true)
            {
                statusBarToolStripMenuItem.Enabled = false;
                statusStrip1.Visible = false;
                hScrollBar1.Visible = false;
                po.X = 0;
                po.Y = 240;
                hScrollBar1.Location =po;
            }
            else
            {
                statusBarToolStripMenuItem.Enabled = true;
                select();
            }
        }

        private void statusBarToolStripMenuItem_Click(object sender, EventArgs e)
        {
            select();
        }

        private void selectAllToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.SelectAll();
        }

        private void timeDateToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string value = textBox1.Text;
            textBox1.Text = DateTime.Now.Hour.ToString() + ":" + DateTime.Now.Minute.ToString() + ":" + 

DateTime.Now.Second.ToString() + "  " + DateTime.Now.Date.ToString() + value;
        }

        private void editToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (textBox1.Text != "")
            {
                findToolStripMenuItem.Enabled = true;
                findNextToolStripMenuItem.Enabled = true;
                if (textBox1.SelectedText != "")
                {
                    copyToolStripMenuItem.Enabled = true;
                    pasteToolStripMenuItem.Enabled = true;
                    cutToolStripMenuItem.Enabled = true;
                    deleteToolStripMenuItem.Enabled = true;
                }
                else
                {
                    copyToolStripMenuItem.Enabled = false;
                    deleteToolStripMenuItem.Enabled = false;
                    cutToolStripMenuItem.Enabled =false;
                }
                if (check != 0)
                {
                    undoToolStripMenuItem.Enabled = true;
                }
                else
                {
                    undoToolStripMenuItem.Enabled = false;
                }
            }
        }

        private void cutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (textBox1.SelectedText != "")
            {
                cutData = textBox1.SelectedText;
                textBox1.Text = textBox1.Text.Remove(textBox1.SelectionStart);
                check = -1;
                text = textBox1.Text;
            }
        }

        private void copyToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (textBox1.SelectedText != "")
            {
                copyData = textBox1.SelectedText;
                check = 1;
            }
        }

        private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (check == -1)
            {
                pasteData = cutData;
                textBox1.Text += pasteData;
            }
            if (check == 1)
            {
                pasteData = copyData;
                textBox1.Text += pasteData;
            }
        }

        private void deleteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (textBox1.SelectedText != "")
            {
                deleteData = textBox1.SelectedText;
                textBox1.Text = textBox1.Text.Remove(textBox1.SelectionStart);
                check = 2;
                text = textBox1.Text;
            }
        }

        private void undoToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (check == 2)
            {
                undoData = deleteData;
                textBox1.Text = text + undoData;
                deleteData = "";
            }
            if (check == -1)
            {
                undoData = cutData;
                textBox1.Text = text + undoData;
                cutData = "";
            }
        }

        private void findToolStripMenuItem_Click(object sender, EventArgs e)
        {
            StoreData.setAllText(textBox1.Text);
            Find find = new Find();
            find.Show();
        }

        private void replaceToolStripMenuItem_Click(object sender, EventArgs e)
        {
            StoreData.setAllText(textBox1.Text);
            Replace_All replace = new Replace_All();
            replace.Show();
        }

        private void goToToolStripMenuItem_Click(object sender, EventArgs e)
        {
            StoreData.setAllText(textBox1.Text);
            Go_To goTo = new Go_To();
            goTo.Show();
        }

        private void findNextToolStripMenuItem_Click(object sender, EventArgs e)
        {
            StoreData.setAllText(textBox1.Text);
            Find find = new Find();
            find.Show();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            current = 1;
        }

        private void helpTopicsToolStripMenuItem_Click(object sender, EventArgs e)
        {
        }

    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Notepad
{
    public partial class Find : Form
    {
        int k = 0;
        string text;
        static int curr = 0;
        public Find()
        {
            InitializeComponent();
        }

        private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
           // string[] k;
          //  k[0] = Form1.textBox1.Lines.GetValue(0);
            if (Form1.textBox1.Text == "")
            {
                MessageBox.Show("Can not find " + textBox1.Text, "Notepad");
            }
            else
            {
                text = StoreData.getAllText();
                if (radioButton2.Checked == true)
                {
                    for (int i = curr; i <= text.Length; i++)
                    {
                        if (curr + textBox1.Text.Length <= text.Length)
                        {
                            if (text.Substring(curr, textBox1.Text.Length) == textBox1.Text)
                            {
                                Form1.textBox1.Select(curr, textBox1.Text.Length);
                                curr++;
                                break;
                            }
                            else
                            {
                                curr++;
                                if (curr == text.Length)
                                {
                                    MessageBox.Show("Can not find " + textBox1.Text, "Notepad");
                                }
                            }
                        }
                    }
                }
                else
                {
                    // k to able the current continuted not in the start
                    if (k == 0)
                    {
                        k = 1;
                        curr = text.Length - textBox1.Text.Length;
                        StoreData.setCurrent(curr);
                    }
                    for (int i = StoreData.getCurrent(); i >= 0; i--)
                    {
                        // if (curr <= 0)
                        //{
                        if (text.Substring(curr, textBox1.Text.Length) == textBox1.Text)
                        {
                            Form1.textBox1.Select(curr, textBox1.Text.Length);
                            
                            curr--;
                            StoreData.setCurrent(curr);
                            break;
                            
                        }
                        else
                        {
                            curr--;
                            if (curr == 0)
                            {
                                MessageBox.Show("Can not find " + textBox1.Text, "Notepad");
                            }
                        }
                        // }
                        StoreData.setCurrent(curr);
                    }
                }
                text = Form1.textBox1.Text;
                StoreData.setAllText(Form1.textBox1.Text);
                Form1.textBox1.Focus();
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            if (textBox1.Text != "")
            {
                curr = 0;
                k = 0;
                button1.Enabled = true;
            }
        }
    }
}