How to count number of characters enterd in a textbox currently?

I had used two textboxs.one for entering text and another textbox is used to display number of characters
enterd.
Select you textbox choose events.In events double click on 'TextChanged' Event and write the below code.

 if (txtmessage.Text.Length > 0)
            {
              
                txtcount.Text = txtmessage.Text.Length.ToString();
            }
            else
                txtcount.Text = Convert.ToString(0);
            

The Desing of Windows form

In form1.cs the complete code is written as follows

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace counttextusingevent
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void txtmessage_TextChanged(object sender, EventArgs e)
        {
            if (txtmessage.Text.Length > 0)
            {
              
                txtcount.Text = txtmessage.Text.Length.ToString();
            }
            else
                txtcount.Text = Convert.ToString(0);
            
        }
    }
}