saving the access token in dynamic crm 2011

public string GetAccessToken()
        {

            _oauth.Token = Application["auth_token"].ToString();
            _oauth.TokenSecret = Application["auth_tokensecret"].ToString();
            _oauth.Verifier = Application["auth_verifier"].ToString();


            _oauth.AccessTokenGet(Application["auth_token"].ToString());

            //string oauth_access = Application["auth_token"].ToString();
            Application["oauth_access"] = _oauth.Token;//Application["oauth_token"].ToString();
            //string oauth_access_secret = Application["auth_tokensecret"].ToString(); oauth_token_secret
            Application["oauth_access_secret"] = _oauth.TokenSecret; //Application["oauth_token_secret"].ToString();

            ClientCredentials Credentials = new ClientCredentials();
            Credentials.Windows.ClientCredential = CredentialCache.DefaultNetworkCredentials;
            //This URL needs to be updated to match the servername and Organization for the environment.

            Uri OrganizationUri = new Uri("http://<crmserver>/<organization name>/XRMServices/2011/Organization.svc");
            Uri HomeRealmUri = null;
            //OrganizationServiceProxy serviceProxy;   

            using (OrganizationServiceProxy serviceProxy = new OrganizationServiceProxy(OrganizationUri, HomeRealmUri, Credentials, null))
            {
                IOrganizationService service = (IOrganizationService)serviceProxy;
                //Instantiate the contact object and populate the attributes.
                Entity new_cooldrink = new Entity("new_cooldrink");
                //Entity Contact = new Entity("contact");
                new_cooldrink["new_name"] = Application["oauth_access"].ToString();//TextBox1.Text.ToString();//txtFirstName.Text.ToString();
                //contact["lastname"] = txtLastName.Text.ToString();
                //contact["emailaddress1"] = txtEmailAddress.Text.ToString();
                //contact["telephone1"] = txtPhoneNumber.Text.ToString();
                Guid newnew_cooldrinkid = service.Create(new_cooldrink);
                //This code will clear the textboxes after the contact is created.
                //TextBox1.Text = "";
            }

            return _oauth.Verifier;

        }