create new textbox control with autocomplete to the attribute asp.net c#

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C#

ASP.NET

controls

I am trying to create a textbox as usercontrol in asp.net c# code behind.

to add some specific feature :

I am using this code for .ascx control :

public TextBoxType Type { set; get; }

    public enum TextBoxType
    {
        String =0,
        Email=1,
        Password=2,
        MultiLine=3,
        Numbers=4,
        Link=5,
        Decimal=6,
    }

and to add this control I am using this :

<BS:TextBox  runat="server" />

every thing works fine but the problem is with the auto complete of the attribute

<BS:TextBox  runat="server" Type=""/>

in the Type attribute I need an auto complete for the values in the enum :
Email - Password ....


How can I do it ?