TPO/Testing/TestProject/BasePage.cs

using OpenQA.Selenium.Support.UI;
using OpenQA.Selenium;
using SeleniumExtras.WaitHelpers;

namespace TestProject
{
    public class BasePage
    {
        protected IWebDriver driver;

        public BasePage(IWebDriver driver)
        {
            this.driver = driver;
        }

        public IWebElement FindElement(By locator)
        {
            return driver.FindElement(locator);
        }

        public void Type(By locator, string text)
        {
            WaitUntilElementIsVisible(locator);
            FindElement(locator).Clear();
            FindElement(locator).SendKeys(text);
        }

        public void Click(By locator)
        {
            WaitUntilElementIsVisible(locator);
            FindElement(locator).Click();
        }

        public void WaitUntilElementIsVisible(By locator, int time = 100)
        {
            WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(time));
            wait.Until(ExpectedConditions.ElementIsVisible(locator));
        }

        public void OpenUrl(string url)
        {
            driver.Navigate().GoToUrl(url);
        }
    }
}