protected override void OnInitialized()
{
Css = (string)AdditionalAttributes.GetValueOrDefault("class");
var expression = (MemberExpression)For.Body;
IsRequired = expression.Member.GetCustomAttribute <RequiredAttribute>() != null ? true : false;
var displayNameAttribute = expression.Member.GetCustomAttribute <DisplayAttribute>();
DisplayName = displayNameAttribute != null ? displayNameAttribute.Name : expression.Member.Name;
}