Which dll used to add “Database.ProfileFields” in DotNetOpenAuth?

[Supergirl]

I want to use the Dot Net Open Auth in my web application, I am following This link to do it. I am dont know what namespace should be used to add "Database.ProfileFields" here is all my code HTML Code is: <div> <asp:Label ID="Label1" runat="server" Text="OpenID Login" /> <asp:TextBox ID="openIdBox" runat="server" /> <asp:Button ID="loginButton" runat="server" Text="Login" OnClick="loginButton_Click" /> <asp:CustomValidator runat="server" ID="openidValidator" ErrorMessage="Invalid OpenID Identifier" ControlToValidate="openIdBox" EnableViewState="false" OnServerValidate="openidValidator_ServerValidate" /> <br /> <asp:Label ID="loginFailedLabel" runat="server" EnableViewState="False" Text="Login failed" Visible="False" /> <asp:Label ID="loginCanceledLabel" runat="server" EnableViewState="False" Text="Login canceled" Visible="False" /></div>Here is code behind code:using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using DotNetOpenAuth.OpenId.RelyingParty;using DotNetOpenAuth.OpenId.Extensions.SimpleRegistration;using DotNetOpenAuth.Messaging;using System.Web.Security;public partial class _Default : System.Web.UI.Page{ protected void openidValidator_ServerValidate(object source, ServerValidateEventArgs args) { // This catches common typos that result in an invalid OpenID Identifier. args.IsValid = DotNetOpenAuth.OpenId.Identifier.IsValid(args.Value); } protected void loginButton_Click(object sender, EventArgs e) { if (!this.Page.IsValid) { return; // don't login if custom validation failed. } try { using (DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingParty openid = new DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingParty()) { IAuthenticationRequest request = openid.CreateRequest(this.openIdBox.Text); // This is where you would add any OpenID extensions you wanted // to include in the authentication request. request.AddExtension(new ClaimsRequest { Country = DemandLevel.Request, Email = DemandLevel.Request, Gender = DemandLevel.Require, PostalCode = DemandLevel.Require, TimeZone = DemandLevel.Require, }); // Send your visitor to their Provider for authentication. request.RedirectToProvider(); } } catch (ProtocolException ex) { // The user probably entered an Identifier that // was not a valid OpenID endpoint. this.openidValidator.Text = ex.Message; this.openidValidator.IsValid = false; } } protected void Page_Load(object sender, EventArgs e) { openIdBox.Focus(); OpenIdRelyingParty openid = new OpenIdRelyingParty(); var response = openid.GetResponse(); if (response != null) { switch (response.Status) { case AuthenticationStatus.Authenticated: // This is where you would look for any OpenID extension responses included // in the authentication assertion. var claimsResponse = response.GetExtension<ClaimsResponse>(); Database.ProfileFields = claimsResponse; // Store off the "friendly" username to display -- NOT for username lookup Database.FriendlyLoginName = response.FriendlyIdentifierForDisplay; // Use FormsAuthentication to tell ASP.NET that the user is now logged in, // with the OpenID Claimed Identifier as their username. FormsAuthentication.RedirectFromLoginPage(response.ClaimedIdentifier, false); break; case AuthenticationStatus.Canceled: this.loginCanceledLabel.Visible = true; break; case AuthenticationStatus.Failed: this.loginFailedLabel.Visible = true; break; } } } }