How to use color dialog in C#

using System;

using System.Drawing;

using System.Windows.Forms;

namespace Colour_Box

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void btnchangecolour_Click(object sender, EventArgs e)

{

ColorDialog cd = new ColorDialog(); //create new color dialog

cd.AllowFullOpen = true; //opening color dialog with extra things

cd.Color = panel1.BackColor; //get box color to color dialog in start

cd.FullOpen = true;

cd.AnyColor = true; //user can choose any color from selection

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

{

panel1.BackColor = cd.Color; //change your box color

}

}

}

}