Метод не найден: 'DotNetOpenAuth.AspNet.AuthenticationResult DotNetOpenAuth.AspNet.OpenAuthSecurityManager.VerifyAuthentication(System.String)'

Question

Я получаю эту ошибку при входе в oAuth через Facebook.

var dd = OAuthWebSecurity.VerifyAuthentication();

Мой код

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
         var  dd = OAuthWebSecurity.VerifyAuthentication();
         if (dd.IsSuccessful == true)
         {
             Response.Write("Login Sucess : " + dd.UserName + ", " + dd.ProviderUserId + ", " + dd.Provider);
             //Do something here like store this information in a database or in the session to remember the active login
          }
     }
 }