WinForm Notepad Preliminary implementation

public Form1 ()
        {
            InitializeComponent ();
        }

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

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

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

        private void undo UToolStripMenuItem_Click (object sender, EventArgs e)
        {
            richTextBox1.Undo ();
        }

        private void Repeat RToolStripMenuItem_Click (object sender, EventArgs e)
        {
            richTextBox1.Redo ();
        }

        private void Select all AToolStripMenuItem_Click (object sender, EventArgs e)
        {
            richTextBox1.SelectAll ();
        }

        private void toolStripStatusLabel2_Click (object sender, EventArgs e)
        {
            
        }

        private void Wrap ToolStripMenuItem_Click (object sender, EventArgs e)
        {
            if (richTextBox1.WordWrap)
            {
                Word wrap ToolStripMenuItem.Checked = false;
                richTextBox1.WordWrap = false;
                toolStripStatusLabel4.Text = "1";
                toolStripStatusLabel6.Text = richTextBox1.TextLength.ToString ();
            }
            else
            {
                Word wrap ToolStripMenuItem.Checked = true;
                richTextBox1.WordWrap = true;
            }
        }

        private void richTextBox1_TextChanged (object sender, EventArgs e)
        {
            toolStripStatusLabel2.Text = richTextBox1.TextLength.ToString (); // Number of characters

            toolStripStatusLabel4.Text = richTextBox1.Lines.Length.ToString (); // Line number
           
            toolStripStatusLabel6.Text = (richTextBox1.SelectionStart-richTextBox1.GetFirstCharIndexOfCurrentLine ()). ToString (); // The number of columns of focus
        }

        private void richTextBox1_Click (object sender, EventArgs e)
        {
            toolStripStatusLabel6.Text = (richTextBox1.SelectionStart-richTextBox1.GetFirstCharIndexOfCurrentLine ()). ToString (); // The number of columns of focus
            
            int index = richTextBox1.GetFirstCharIndexOfCurrentLine (); // GetFirstCharIndexOfCurrentLine () index of the first character of the current line
            // GetLineFromCharIndex (index) specifies the index line number of the position
            toolStripStatusLabel4.Text = (richTextBox1.GetLineFromCharIndex (index) + 1) .ToString (); // The line number where the focus is
        } 

WinForm Notepad Initial implementation