ViewState in Dynamic Control

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ContactDetails.ascx.cs"
    Inherits="UserControl_ContactDetails" EnableViewState="false"  %>
    <br />
<table width="100%" cellpadding="2" cellspacing="2" style="border:1px solid black;">
    <tr>
        <td>
            First Name
        </td>
        <td>
            <asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>
        </td>
        <td>
            Last Name
        </td>
        <td>
            <asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>
        </td>
    </tr>
    <tr>
        <td>
            Address 1
        </td>
        <td>
            <asp:TextBox ID="txtAddress1" runat="server"></asp:TextBox>
        </td>
        <td>
            Address 2
        </td>
        <td>
            <asp:TextBox ID="txtAddress2" runat="server"></asp:TextBox>
        </td>
    </tr>
    <tr>
        <td>
            City
        </td>
        <td>
            <asp:TextBox ID="txtCity" runat="server"></asp:TextBox>
        </td>
        <td>
            Zip
        </td>
        <td>
            <asp:TextBox ID="txtZip" runat="server"></asp:TextBox>
        </td>
    </tr>
</table>