Custom WFFM dropdown list

CustomDropDownList.cs (used only in Sitecore when using MVC)

public class CustomDropDownList : DropList
    {
        private static readonly string BaseCssClassName = "scfCustomlistBorder";

        [ParameterName("emptychoicetext")]
        [VisualCategory("Custom")]
        [VisualProperty("Empty Choice Text:")]
        public string EmptyChoiceText { get; set; }

        [ParameterName("showemptychoice")]
        [VisualCategory("Custom")]
        [VisualFieldType(typeof(BooleanField))]
        [VisualProperty("Show Empty Choice:")]
        public bool ShowEmptyChoice { get; set; }

        [ParameterName("initialselection")]
        [VisualCategory("Custom")]
        [VisualProperty("Initial Selection:")]
        public string InitialSelection { get; set; }

        [VisualFieldType(typeof(CssClassField))]
        [DefaultValue("scfCustomlistBorder")]
        [VisualProperty("CSS Class:", 600)]
        public new string CssClass
        {
            get { return base.CssClass; }
            set { base.CssClass = value; }
        }

        //blank out inheritted properties
        public new ListItemCollection Items
        {
            get { return this.items; }
            set { this.items = value; }
        }

        public new string EmptyChoice
        {
            get { return false.ToString(); }
        }

        public new ListItemCollection SelectedValue
        {
            get { return this.selectedItems; }
            set { this.selectedItems = value; }
        }

        protected override void InitItems(ListItemCollection items)
        {
            base.InitItems(items);
        }

        protected override void DoRender(HtmlTextWriter writer)
        {
            base.DoRender(writer);
        }

    }