Not getting notification in iOS from ASP.NET C#

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C#

ASP.NET

iOS

I have implement the below code for sending push notification to ios from my asp.net c# code , i am not getting any error but same time i didn't get any notification on ios device. i am using push sharp library version 2.0.0.4.

What I have tried:

//Create our push services broker
var push = new PushBroker();
push.OnNotificationSent += NotificationSent;
push.OnChannelException += ChannelException;
push.OnServiceException += ServiceException;
push.OnNotificationFailed += NotificationFailed;
push.OnDeviceSubscriptionExpired += DeviceSubscriptionExpired;
push.OnDeviceSubscriptionChanged += DeviceSubscriptionChanged;
push.OnChannelCreated += ChannelCreated;
push.OnChannelDestroyed += ChannelDestroyed;
//Registering the Apple Service and sending an iOS Notification
var appleCert = File.ReadAllBytes("PushnotificationDev.p12");
push.RegisterAppleService(new ApplePushChannelSettings(appleCert, "123456"));
push.QueueNotification(new AppleNotification()
                           .ForDeviceToken("0755ac6c555e9b9e819b15772e6bcb11d64c659d331a28cf7674050a20fa885i")
                           .WithAlert("Hello World!")) ;