convertidor de color hexadecimal en c#(Orientado a objetos)

Elementos que necesitaremos para hacer nuestro convertidor 

 

Código del programa;

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 WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        string Color_to_Hex(Color c)

        {

            return ColorTranslator.ToOle(c).ToString("X");

        }

        //===============================

        Color Hex_to_Color(string hx)

        {

            int x = int.Parse(hx, System.Globalization.NumberStyles.HexNumber);

            Color c = ColorTranslator.FromOle(x);

            return c;

        }

        //===============================

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            string[] colors = Enum.GetNames(typeof(KnownColor));

            foreach (string s in colors)

            {

                listBox1.Items.Add(s);

            }

            label1.Text = "";

            this.Opacity = 0.95;

           

        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

            string str = listBox1.SelectedItem.ToString();

            Color c = Color.FromName(str);

            textBox1.Text = Color_to_Hex(c);

            button1.BackColor = c;

        }

        private void button2_Click(object sender, EventArgs e)

        {

            try

            {

                string str = textBox2.Text;

                Color c = Hex_to_Color(str);

                label1.Text = "Name : " + c.Name;

                button3.BackColor = c;

            }

            catch

            {

                label1.Text = "Error !!!";

            }

        }

        private void button4_Click(object sender, EventArgs e)

        {

            Application.Exit();

        }

        private void button5_Click(object sender, EventArgs e)

        {

            textBox1.Clear();

            textBox2.Clear();

          

        }

        private void button6_Click(object sender, EventArgs e)

        {

            string about = "";

            about = "creado por jose angel \n" + "2016 uadec\n" + " febrero";

            MessageBox.Show(about, "ua de c", MessageBoxButtons.OK, MessageBoxIcon.Information);

        }

    }

}