AdvancedBrowserOperations.cs

// Handle JavaScript pop-ups
IAlert a = driver.SwitchTo().Alert();
a.Accept();
a.Dismiss();
// Switch between browser windows or tabs
ReadOnlyCollection<string> windowHandles = driver.WindowHandles;
string firstTab = windowHandles.First();
string lastTab = windowHandles.Last();
driver.SwitchTo().Window(lastTab);
// Navigation history
this.driver.Navigate().Back();
this.driver.Navigate().Refresh();
this.driver.Navigate().Forward();
// Option 1.
link.SendKeys(string.Empty);
// Option 2.
((IJavaScriptExecutor)driver).ExecuteScript("arguments[0].focus();", link);
// Maximize window
this.driver.Manage().Window.Maximize();
// Add a new cookie
Cookie cookie = new OpenQA.Selenium.Cookie("key", "value");
this.driver.Manage().Cookies.AddCookie(cookie);
// Get all cookies
var cookies = this.driver.Manage().Cookies.AllCookies;
// Delete a cookie by name
this.driver.Manage().Cookies.DeleteCookieNamed("CookieName");
// Delete all cookies
this.driver.Manage().Cookies.DeleteAllCookies();
//Taking a full-screen screenshot
Screenshot screenshot = ((ITakesScreenshot)driver).GetScreenshot();
screenshot.SaveAsFile(@"pathToImage", ImageFormat.Png);
// Wait until a page is fully loaded via JavaScript
WebDriverWait wait = new WebDriverWait(this.driver, TimeSpan.FromSeconds(30));
wait.Until((x) =>
{
    return ((IJavaScriptExecutor)this.driver).ExecuteScript("return document.readyState").Equals("complete");
});
// Switch to frames
this.driver.SwitchTo().Frame(1);
this.driver.SwitchTo().Frame("frameName");
IWebElement element = this.driver.FindElement(By.Id("id"));
this.driver.SwitchTo().Frame(element);
// Switch to the default document
this.driver.SwitchTo().DefaultContent();