c# Registro Windows

using System;

using Microsoft.Win32;

namespace navegador
{
    public partial class Config : Form
    {

            //editar el registro
            RegistryKey runK = Registry.LocalMachine.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Run", true);

            var res = runK.GetValue("navegadorBux");
            if (checkBox1.Checked)
            {
                runK.SetValue("navegadorBux", @System.Reflection.Assembly.GetExecutingAssembly().Location); 
            }
            else
            {
                if (res != null)
                {
                    runK.DeleteValue("navegadorBux");
                }                  
            }
        
    }
}