seleniumExt.cs

using System;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using OpenQA.Selenium;

namespace SeleniumExt
{
    public static class DriverExt
    {
        public static async Task<IWebElement> WaitFindElement(this IWebDriver driver, By by, Func<IWebElement, bool> predicate)
        {
            var cts = new CancellationTokenSource(TimeSpan.FromSeconds(30));
            while (!cts.IsCancellationRequested)
            {
                var elements = driver.FindElements(by).Where(predicate).ToArray();
                if (elements.Any()) return elements.First();

                await Task.Delay(1000);
            }

            var screen = (ITakesScreenshot) driver;
            var screenshot = screen.GetScreenshot();

            var id = Guid.NewGuid();

            await File.WriteAllBytesAsync($"Data/screenshots/{id:N}.jpg", screenshot.AsByteArray, CancellationToken.None);

            throw new Exception($"[{id}] Element not found by {by}");
        }

        public static Task<IWebElement> FindRaw(this IWebDriver driver, By by)
            => driver.WaitFindElement(by, s => true);


        public static Task<IWebElement> FindActive(this IWebDriver driver, By by)
            => driver.WaitFindElement(by, s => s.Displayed && s.Enabled);