The value of this attribute on the element, as a string value. If the specified attribute does not exist on this element, returns an empty string.
An attribute in HTML is any valid name/value pair for that element. System.Windows.Forms.HtmlElement exposes only those attributes that are common to all elements, leaving out those that only apply to certain types of elements; SRC is a predefined attribute for the IMG tag, for example, but not for the DIV tag. Use HtmlElement.GetAttribute(string) and HtmlElement.SetAttribute(string, string) to manipulate attributes not exposed on the managed Document Object Model (DOM).
HtmlElement.GetAttribute(string) and HtmlElement.SetAttribute(string, string) are case-insensitive.