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

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

		private void RTB_TextChanged(object sender, EventArgs e)
		{
			if (changing) return;
			changing = true;
			TB.Text = RTB.Rtf;
			changing = false;
		}

		bool changing = false;

		private void TB_TextChanged(object sender, EventArgs e)
		{
			if (changing) return;
			changing = true;
			RTB.Rtf = TB.Text;
			changing = false;
		}
	}
}