ApiUsability.cs

IWebDriver driver = new ChromeDriver();

driver.Navigate().GoToUrl("http://demos.bellatrix.solutions/");

var wait15Seconds = new WebDriverWait(driver, TimeSpan.FromSeconds(15));
var wait30Seconds = new WebDriverWait(driver, TimeSpan.FromSeconds(30));
var wait45Seconds = new WebDriverWait(driver, TimeSpan.FromSeconds(45));

var promotionsLocator = By.Id("Promotions");
wait15Seconds.Until(ExpectedConditions.ElementExists(promotionsLocator)); // same 30 seconds
var promotionsLink = wait30Seconds.Until(ExpectedConditions.ElementToBeClickable(promotionsLocator));
        
promotionsLink.Click();