Selenium linke tıklatma

IWebDriver driver = new InternetExplorerDriver();
driver.Navigate().GoToUrl("http://www.google.com");

// find directly, note it's not in the <a> but in <span>
// driver.FindElement(By.XPath("//span[text()='YouTube']")).Click();

// your logic with LINQ
IList<IWebElement> links = driver.FindElements(By.TagName("a"));
links.First(element => element.Text == "YouTube").Click();

// your logic with traditional foreach loop
foreach (var link in links) {
    if (link.Text == "YouTube") {
        link.Click();
        break;
    }
}

driver.Quit();