How To Select Dropdown In Selenium C#?

dropdown test.cs

using NUnit.Framework;
using OpenQA.Selenium;
using OpenQA.Selenium.Support.UI;
using System;
using OpenQA.Selenium.Remote;
 
namespace SeleniumTutorial
{
    public class DropDown
    {
        private static IWebDriver driver;
        public static string gridURL = "@hub.lambdatest.com/wd/hub";
        public static string LT_USERNAME = "LT_USERNAME";
        public static string LT_ACCESS_KEY = "LT_ACCESS_KEY";
 
        [SetUp]
        public void Setup()
        {
            var desiredCapabilities = new DesiredCapabilities();
            desiredCapabilities.SetCapability("browserName", "Chrome");
            desiredCapabilities.SetCapability("platform", "Windows 11");
            desiredCapabilities.SetCapability("version", "101.0");
            desiredCapabilities.SetCapability("screenResolution", "1280x800");
            desiredCapabilities.SetCapability("user", LT_USERNAME);
            desiredCapabilities.SetCapability("accessKey", LT_ACCESS_KEY);
            desiredCapabilities.SetCapability("build", "Selenium C-Sharp");
            desiredCapabilities.SetCapability("name", "Selenium Test");
            driver = new RemoteWebDriver(new Uri($"https://{LT_USERNAME}:{LT_ACCESS_KEY}{gridURL}"), desiredCapabilities, TimeSpan.FromSeconds(600));
        }
 
        [Test]
        public void ValidateDropDownSelection()
        {
            string dayOfTheWeek = "Wednesday";
            driver.Navigate().GoToUrl("https://www.lambdatest.com/selenium-playground/select-dropdown-demo");
            SelectElement dropDown = new SelectElement(driver.FindElement(By.Id("select-demo")));
            dropDown.SelectByValue(dayOfTheWeek);
            string actualText = driver.FindElement(By.CssSelector(".selected-value.text-size-14")).Text;
            Assert.True(actualText.Contains(dayOfTheWeek), $"The expected day of the week {dayOfTheWeek} was not selected. The actual text was: {actualText}.");
        }
 
        [TearDown]
        public void TearDown()
        {
            driver.Quit();
        }
    }
}