PerformanceCounter - Uso de la CPU

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;
using System.Diagnostics;

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

        PerformanceCounter CPU = new PerformanceCounter( "Processor", "% Processor Time", "_Total");
     

        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text = (CPU.NextValue().ToString() + " %");
        }
    }
}