How send push notification from windows app

Question

I want to send a push notification for Windows phone 8.1, from a desktop windows app.

I found this example:

private static async void SendNotificationAsync()
    {
        // Define the notification hub.
        NotificationHubClient hub =
            NotificationHubClient.CreateClientFromConnectionString(
                "Endpoint=sb://...notificationhub-ns.servicebus.windows.net/;SharedAccessKeyName=DefaultFullSharedAccessSignature;SharedAccessKey=9w3Mo....NNcDRI=", "MinskTransNotificationBeta");

        // Create an array of breaking news categories.
        var categories = new string[] { "World", "Politics", "Business", 
    "Technology", "Science", "Sports"};

        foreach (var category in categories)
        {
            try
            {
                // Define a Windows Store toast.
                //var wnsToast = "<toast><visual><binding template=\"ToastText01\">"
                //  + "<text id=\"1\">Breaking " + category + " News!"
                //  + "</text></binding></visual></toast>";
                //await hub.SendWindowsNativeNotificationAsync(wnsToast, category);

                // Define a Windows Phone toast.
                var mpnsToast =
                    "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
                    "<wp:Notification xmlns:wp=\"WPNotification\">" +
                        "<wp:Toast>" +
                            "<wp:Text1>Breaking " + category + " News!</wp:Text1>" +
                        "</wp:Toast> " +
                    "</wp:Notification>";
                await hub.SendMpnsNativeNotificationAsync(mpnsToast, category);


            }
            catch (ArgumentException)
            {
                // An exception is raised when the notification hub hasn't been 
                // registered for the iOS, Windows Store, or Windows Phone platform. 
            }
        }
    }

But I get exception NotFound

An exception of type 'Microsoft.ServiceBus.Messaging.MessagingEntityNotFoundException' occurred in mscorlib.dll but was not handled in user code

Additional information: The remote server returned an error: (404) Not Found. No service is hosted at the specified address..TrackingId:7443c7a8-....c03f7da9_G4,TimeStamp:6/1/2015 9:22:48 PM

Answer 1

Check service at this endpoint.

Most likely an error in the connection string.

Answer 2

Check

• Enable Unauthenticated push notifications from Azure Portal.
• Check your Connection String and be sure that you are using FullSharedAccesKey.(Your SAS name must match within the string in your Connection String)
• You have an internet connection.

Answer 3

Check if you are spelling the NH name correctly or if you have "MinskTransNotificationBeta" actually in the portal.

So mainly this kind of error is Setup/configuration error and it's recommended to review your configuration and change if necessary.

you can check this link to know further about this error.