Tworzenie menu g�rnego - zmiana koloru t�a formy

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 Menu5
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void CzerwonyToolStripMenuItem_Click(object sender, EventArgs e)
{
this.BackColor = Color.Red;
}
private void ZielonyToolStripMenuItem_Click(object sender, EventArgs e)
{
this.BackColor = Color.Green;
}
private void NiebieskiToolStripMenuItem_Click(object sender, EventArgs e)
{
this.BackColor = Color.Blue;
}
private void RGBToolStripMenuItem_Click(object sender, EventArgs e)
{
int r, g, b;
int.TryParse(toolStripTextBox1.Text, out r);
int.TryParse(toolStripTextBox2.Text, out g);
int.TryParse(toolStripTextBox3.Text, out b);
this.BackColor = Color.FromArgb(r, g, b);
}
}
}