Android C2DM messages are lost?

Question

I'm sending notifications with android C2DM. I'm using C2dmSharp. I'm trying to send 200 different notifications to my phone. Server-side I get an OK response with an id=[ID of sent message] (like documented here) so I guess my serve is doing well. But on my phone I only get a few notifications... NOT 200! Ok I know it's not a guaranteed service but it's like 90% of notifications that aren't sent. Am I doing anything wrong? Is it actually possible to send 200 messages in a row to one device?

If you know a better place to ask this, please enlighten me :)

I'm using this to send the notifications

Here's the code :

if (notificationService != null)
            {
                notificationService.Start();
                foreach (var itemToProcess in itemsToProcess)
                {
                    itemToProcess.NotificationDateTime = DateTime.Now;
                    mobile.SubmitChanges();

                    string deviceToken = GetCleanDeviceToken(itemToProcess.MobileDevice.PushNotificationIdentifier);
                    var extras = new NameValueCollection();
                    extras.Add("salemessage", itemToProcess.MobileDeviceNotificationText.Text);
                    extras.Add("ismultisale", "false");
                    if (itemToProcess.SaleId.HasValue) extras.Add("saleid", itemToProcess.SaleId.Value.ToString());
                    try
                    {   
                        Thread.Sleep(200);
                        notificationService.QueueMessage(deviceToken, extras, "key");
                    }
                    catch (Exception exception)
                    {
                        //logging
                    }
                }

                notificationService.Stop();
            }

Answer 1

So as C2DM is deprecated, let's use GCM! For .NET servers, there's https://github.com/Redth/PushSharp