Using Enums to set Custom Server Control Properties, Intellsence for web control property

Write enum outside of your class where do you wanted to display default values i.e. enum values
public enum My_Numbers {
    One = 1,
    Two = 2,
    Three = 3,
    Four = 4,
    Five = 5
}

Include below code where you wanted to displayed on your page i.e. User Control , so you can directly see the values against property Sel_Number = {One,Two,Three,Four,Five}

   public My_Numbers Sel_Number
    {
        get
        {
            My_Numbers s = (My_Numbers)ViewState["Sel_Number"];
            return s;
        }
        set { ViewState["Sel_Number"] = value; }
    }
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For More Details Below Complete Code
public enum MyEnum
    {
        Apple,
        Organge
    }

    [DefaultProperty("Text")]
    [ToolboxData("<{0}:TestEnum runat=server></{0}:TestEnum>")]
    public class TestEnum : WebControl
    {
        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("")]
        [Localizable(true)]
        public MyEnum Text
        {
            get
            {
                MyEnum s = (MyEnum)ViewState["Text"];
                return s;
            }
            set { ViewState["Text"] = value; }
        }

        protected override void RenderContents(HtmlTextWriter output)
        {
            output.Write(Text.ToString());
        }
    }