c# - Google カレンダー API エラー 405

Question

このサンプル コードから Google Calendar API を試してみましたが、次のエラーが発生します。

Execution of authentication request returned unexpected result: 405

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: Google.GData.Client.GDataRequestException: Execution of authentication request returned unexpected result: 405

スタックトレース：

スタックトレース：

[GDataRequestException: 認証要求の実行で予期しない結果が返されました: 405]
_2.BusinessLogicLayer.LogicClasses.LeaveLogic.AddToGoogleCalendar() in C:\Users\Samsung\Desktop\Development\Ticketing system\2.BusinessLogicLayer\LogicClasses\LeaveLogic.cs:375
C:\Users\Samsung\Desktop\Development\Ticketing system\1.PresentationLayer\WebPages\LeaveRequest.aspx.cs:403
System.Web.UI. WebControls.Button.OnClick(EventArgs e) +9553594
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +103
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument ) ) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) + 1724年

コード：

string sGoogleUserName = "******@gmail.com";
            string sGooglePassword = "*****";
            Uri oCalendarUri = new Uri("http://www.google.com/calendar/feeds/" + sGoogleUserName + "/private/full");

            //Initialize Calendar Service
            CalendarService oCalendarService = new CalendarService("CalendarSampleApp");
            oCalendarService.setUserCredentials(sGoogleUserName, sGooglePassword);

            //Use Proxy 
            GDataRequestFactory oRequestFactory = (GDataRequestFactory)oCalendarService.RequestFactory;
            WebProxy oWebProxy = new WebProxy(WebRequest.DefaultWebProxy.GetProxy(oCalendarUri));
            oWebProxy.Credentials = CredentialCache.DefaultCredentials;
            oWebProxy.UseDefaultCredentials = true;
            oRequestFactory.Proxy = oWebProxy;


            //Set Event Entry 
            EventEntry oEventEntry = new EventEntry();
            oEventEntry.Title.Text = "Test Calendar Entry From .Net";
            oEventEntry.Content.Content = "Hurrah!!! I posted my first Google calendar event through .Net";

            //Set Event Location 
            Where oEventLocation = new Where();
            oEventLocation.ValueString = "New Zealand";
            oEventEntry.Locations.Add(oEventLocation);

            //Set Event Time
            When oEventTime = new When(new DateTime(2011, 5, 31, 9, 0, 0), new DateTime(2011, 5, 31, 9, 0, 0).AddHours(1));
            oEventEntry.Times.Add(oEventTime);

            //Set Additional Properties
            ExtendedProperty oExtendedProperty = new ExtendedProperty();
            oExtendedProperty.Name = "SynchronizationID";
            oExtendedProperty.Value = Guid.NewGuid().ToString();
            oEventEntry.ExtensionElements.Add(oExtendedProperty);

            // CalendarService oCalendarService = GAuthenticate();

            //Prevents This Error
            //{"The remote server returned an error: (417) Expectation failed."}
            System.Net.ServicePointManager.Expect100Continue = false;

            //Save Event
            oCalendarService.Insert(oCalendarUri, oEventEntry);