Failed to get Google Task list with. NET Call Googleapi

The code is as follows

static void Main (string[] args) {//Register the authenticator.            The Client ID and secret has the copied from the API Access//tab on the Google APIs Console.            var Provider = new Nativeapplicationclient (googleauthenticationserver.description); Provider.            Clientidentifier = "272908629865.apps.googleusercontent.com"; Provider.            Clientsecret = "4umdindilov5bv-qrqz2xuwa";            var auth = new Oauth2authenticator<nativeapplicationclient> (provider, getauthentication);            Create the service and register the previously created OAuth2 Authenticator.            var service = new Tasksservice (auth); tasklists results = service. Tasklists.list ().            Fetch (); foreach (TaskList list in results. Items) {Console.WriteLine (list.            Title);  }} private static Iauthorizationstate getauthentication (Nativeapplicationclient arg) {// Get the AUTH url:iauthorizationstate state = new Authorizationstate (new[] {TasksService.Scopes.Tasks.ToString ()}); State.            Callback = new Uri (Nativeapplicationclient.outofbandcallbackurl); Uri Authuri = arg.            Requestuserauthorization (state);            Request authorization from the user (by opening a browser window): Process.Start (Authuri.tostring ());            Console.Write ("Authorization Code:");            String authcode = Console.ReadLine ();            Console.WriteLine (); Retrieve the access token by using the authorization Code:return ARG.        Processuserauthorization (Authcode, state); }

Run

Process.Start (Authuri.tostring ()); The result in the browser is:

OAuth2.0 Error: Invalid_scope

You can email the developer of this application at:jipen ... @gmail. com

Some requested scopes were invalid. {Invalid=[tasks]}

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