C# Selenium code to handle frames

SeleniumFrameHandling.cs

    public class SeleniumFrameHandling {
        public static void Main(string[] args)
        {

            new DriverManager().SetUpDriver(new ChromeConfig());
            var driver = new ChromeDriver();
           
            driver.Manage().Window.Maximize();

                       
            driver.Navigate().GoToUrl("https://the-internet.herokuapp.com/tinymce");
           

            driver.SwitchTo().Frame("mce_0_ifr");
            var contentfield = driver.FindElement(By.XPath("//*[@id='tinymce']/p"));
            contentfield.Clear();
            contentfield.SendKeys("test automation");

            driver.SwitchTo().DefaultContent();
            Console.WriteLine(driver.FindElement(By.TagName("h3")).Text);

        }
    }