How to make 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;
 
namespace New_Notepad
{
    public partial class Notepad : Form
    {
        public Notepad()
        {
            InitializeComponent();
        }
 
        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Clear();
        }
 
        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.Title = "Open";
            dlg.Filter = "Text Document(*.txt)*.txt|All Files(*.*)|*.*";
            dlg.ShowDialog();
            richTextBox1.LoadFile(dlg.FileName);
        }
 
        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            SaveFileDialog dlg = new SaveFileDialog();
            
        }
 
        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Close();
        }
 
        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();
        }
 
        private void wordWrapToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (richTextBox1.WordWrap == false)
                
        }
 
        
    }
}

 

 

 
I have learned to make web applications but dont know windows application..I want to learn windows application...I'm trying to create a notepad in windows application..Here is my code please correct this and tell me the proper code...And I'm using C# for making this..