ColorDialog with RichtextBox in Win Forms

ColorDialog with RichtextBox in Win Forms 

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 opendialog1

{

    public partial class Form5 : Form

    {

        public Form5()

        {

            InitializeComponent();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            OpenFileDialog ofdlg = new OpenFileDialog();

            ofdlg.InitialDirectory = @"C:\";

            ofdlg.RestoreDirectory = true;

            ofdlg.Title = "Open Text Files";

            ofdlg.DefaultExt = "txt";

            ofdlg.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";

            ofdlg.FilterIndex = 2;

            ofdlg.CheckFileExists = true;

            ofdlg.CheckPathExists = true;

            if (ofdlg.ShowDialog() == DialogResult.OK)

            {

                richTextBox1.SelectionFont = new Font("Verdana", 12, FontStyle.Bold);

                richTextBox1.SelectionColor = Color.Red;

                richTextBox1.LoadFile(ofdlg.FileName, RichTextBoxStreamType.PlainText);

                this.Text = ofdlg.FileName.ToString();

            }

        }

        private void button3_Click(object sender, EventArgs e)

        {

            richTextBox1.Clear();

            richTextBox1.ResetText();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            ColorDialog colorDlg = new ColorDialog();

            colorDlg.AllowFullOpen = false;

            colorDlg.AnyColor = true;

            colorDlg.SolidColorOnly = false;

            colorDlg.Color = Color.Red;

            if (colorDlg.ShowDialog() == DialogResult.OK)

            {

                richTextBox1.ForeColor = colorDlg.Color;

                richTextBox1.BackColor = colorDlg.Color;

               

            }

  

        }

        

    }

}