BingMainPage.cs

using System;
using OpenQA.Selenium;
using OpenQA.Selenium.Support.UI;

namespace HuddlePageObjectsPartialClassesCSharpSeven.ImprovedVersion
{
    public partial class BingMainPage
    {
        private readonly IWebDriver _driver;
        private readonly WebDriverWait _driverWait;
        private readonly string _url = @"http://www.bing.com/";

        public BingMainPage(IWebDriver browser) => _driver = browser;
        public BingMainPage(WebDriverWait wait) => _driverWait = wait ?? throw new ArgumentNullException(nameof(wait));
        
        public void Navigate() => _driver.Navigate().GoToUrl(_url);

        public void Search(string textToType)
        {
            SearchBox = textToType;
            GoButton.Click();
        }
    }
}