By.cs

public class By
{
    public By(SearchType type, string value) : 
    this(type, value, null)
    {
    }

    public SearchType Type { get; private set; }

    public string Value { get; private set; }

    public static By Id(string id)
    {
        return new By(SearchType.Id, id);
    }

    public static By InnerTextContains(string innerText)
    {
        return new By(SearchType.InnerTextContains, innerText);
    }

    public static By Xpath(string xpath)
    {
        return new By(SearchType.XPath, xpath);
    }
  
    public static By Id(string id, IElement parentElement)
    {
        return new By(SearchType.Id, id, parentElement);
    }

    public static By CssClass(string cssClass)
    {
        return new By(SearchType.CssClass, cssClass);
    }
   
    public static By Name(string name)
    {
        return new By(SearchType.Name, name);
    }
}