PageObject.cs

public class Trade_Me_logon
    {
        // Define the element and how will we find it ?
        [FindsBy(How = How.Id, Using = "nz.co.trademe.trademe:id/editTextLoginEmail")]
        IWebElement LoginField { get; set; }

        // Do some action on the element
        public void Enter_UserName(string text)
        {
            LoginField.SendKeys(text);
        }