HtmlFormControlElement abstract class HtmlFormControlElement : HtmlElement, ILabelabelElement, IValidation Represents the base class for all HTML form control elements. Documentation Code public bool Autofocus { get; set; } public IHtmlFormElement Form { get; } public bool IsDisabled { get; set; } public INodeList Labels { get; } public string Name { get; set; } public string ValidationMessage { get; } public IValidityState Validity { get; } public bool WillValidate { get; } public HtmlFormControlElement(Document owner, string name, string prefix, NodeFlags flags = 0) protected abstract bool CanBeValidated() protected virtual void Check(ValidityState state) public bool CheckValidity() protected virtual bool IsFieldsetDisabled() protected void ResetValidity(ValidityState state) public void SetCustomValidity(string error)