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Error 404 when using Xbox Live SDK Leaderboards

I’ve built a game (C#, UWP, Monogame) and want to integrate it with Xbox Live SDK (Microsoft.Xbox.Live.SDK.WinRT.UWP from NuGet).
Already got auth working but experiencing some problems with StatisticManager/Leaderboard.
What exactly am I doing:
Add user with StatisticManager.AddLocalUser(user) and wait for StatisticEventType.LocalUserAdded event from DoWork
Save score with StatisticManager.SetStatisticNumberData(user, leaderboardName, data) and wait for StatisticEventType.StatisticUpdateComplete event from DoWork
Get the leaderboard with StatisticManager.GetLeaderboard(user, leaderboardName, query) and wait for StatisticEventType.GetLeaderboardComplete event from DoWork
On step 3 I get a C++ exception:
“Not found (404)”.
[This looks very similar to this issue](Exceptions and Error 404 when using StatsManager
).
So I’ve already checked the sandbox ID, config file and leaderboard ID but still get the same result.
I did capture the traffic from HTTP monitoring and I see URL like:
"https://leaderboards.xboxlive.com/scids/{scid}/leaderboards/stat({leaderboardId})?xuid={myXboxId}&maxItems=5"

under development, you must change your Xbox SANDBOX from RETAIL to {your sandbox} using XboxLiveTools (you can find it in github).
after published you can switch it back to RETAIL,and if there is no data in leaderboard return result with zero row no exception throw
I fixed the same problem by myself

Xamarin Android - VpnService is blocking all apps

An app I'm designing uses the VpnService, along with the VpnService.Builder, classes to generate a VPN in order to block traffic from specific apps. According to the documentation over at developer.android.com, all apps should be allowed through the VPN until Builder.AddAllowedApplication or Builder.AddDisallowedApplication is called.
When my VPN service starts up, for some reason, all apps are being disallowed which is strange. As soon as I disconnect from the VPN, all apps become available again. I need to to allow all, unless otherwise specified (which is what the documentation says should be happening). I start the VPN by calling the following:
private string _sTag = typeof(VpnService).Name;
private VpnServiceBinder _objBinder;
private ParcelFileDescriptor _objVpnInterface = null;
private PendingIntent _objPendingIntent = null;
...
if (_objVpnInterface == null)
{
Builder objVpnBuilder = new Builder(this);
objVpnBuilder.AddAddress("10.0.0.2", 32);
objVpnBuilder.AddRoute("0.0.0.0", 0);
// Form the interface
_objVpnInterface = objVpnBuilder.SetSession("Squelch").SetConfigureIntent(_objPendingIntent).Establish();
// Disallow instagram as a test
objVpnBuilder.AddDisallowedApplication("com.instagram.android");
// Set flag
_bVpnIsRunning = true;
}
So in the above instance, instagram should be the only blocked app, but all traffic appears to be blocked (can't use the chrome app, facebook, etc). Is there something I am missing in regards to this? Should I be specifying something before/after establishing the interface? Any help or direction would be greatly appreciated!
Note: In case it matters, I am targeting android 6.0 and higher. I can provide more source if required.

addDisallowedApplication:
By default, all applications are allowed access, except for those denied through this method. Denied applications will use networking as if the VPN wasn't running.
AddDisallowedApplication excludes the application from your VPNService and allows it to continue to use the "non-VPN" networking stack.
addAllowedApplication:
Adds an application that's allowed to access the VPN connection
Note: You can use an allowed or disallowed list, but not both at the same time.
So lets say we want to "block" any Chrome package from accessing the normal networking stack and redirect any Chrome apps from accessing the network via our "blocking" VPN, we can add all Chrome app package names to our VPNService implementation.
Note: there are 4(?) different Chrome apps, alpha, beta, etc.... so lets just block any package that has the name chrome in it, not really ideal, but for an example it works.
using (var pm = Application.Context.PackageManager)
{
var packageList = pm.GetInstalledPackages(0);
foreach (var package in packageList)
{
if (package.PackageName.Contains("chrome"))
{
Log.Debug(TAG, package.PackageName);
builder.AddAllowedApplication(package.PackageName);
}
}
}
After you .Establish() the VPN connection, all Chrome applications networking will be redirected to your VPNService and thus blocked.

Converting Microsoft EWS StreamingNotification Example to a service

I've been working to try and convert Microsoft's EWS Streaming Notification Example to a service
( MS source http://www.microsoft.com/en-us/download/details.aspx?id=27154).
I tested it as a console app. I then used a generic service template and got it to the point it would compile, install, and start. It stops after about 10 seconds with the ubiquitous "the service on local computer started and then stopped."
So I went back in and upgraded to C# 2013 express and used NLog to put a bunch of log trace commands to so I could see where it was when it exited.
The last place I can find it is in the example code, SynchronizationChanges function,
public static void SynchronizeChanges(FolderId folderId)
{
logger.Trace("Entering SynchronizeChanges");
bool moreChangesAvailable;
do
{
logger.Trace("Synchronizing changes...");
//Console.WriteLine("Synchronizing changes...");
// Get all changes since the last call. The synchronization cookie is stored in the
// _SynchronizationState field.
// Only the the ids are requested. Additional properties should be fetched via GetItem
//calls.
logger.Trace("Getting changes into var changes.");
var changes = _ExchangeService.SyncFolderItems(folderId, PropertySet.IdOnly, null, 512,
SyncFolderItemsScope.NormalItems,
_SynchronizationState);
// Update the synchronization cookie
logger.Trace("Updating _SynchronizationState");
the log file shows the trace message ""Getting changes into var changes." but not the "Updating _SynchronizationState" message.
so it never gets past var changes = _ExchangeService.SyncFolderItems
I cannot for the life figure out why its just exiting. There are many examples of EWS streaming notifications. I have 3 that compile and run just fine but nobody as far as I can tell has posted an example of it done as a service.

If you don't see the "Updating..." message it's likely the sync threw an exception. Wrap it in a try/catch.
OK, so now that I see the error, this looks like your garden-variety permissions problem. When you ran this as a console app, you likely presented the default credentials to Exchange, which were for your login ID. For a Windows service, if you're running the service with one of the built-in accounts (e.g. Local System), your default credentials will not have access to Exchange.
To rectify, either (1) run the service under the account you did the console app with, or (2) add those credentials to the Exchange Service object.

Push Notifications with PushSharp - the basics

I need to push notifications to tens of thousands of iOS devices that my app installed. I'm trying to do it with PushSharp, but I'm missing some fundamental concepts here. At first I tried to actually run this in a Windows service, but couldn't get it work - getting null reference errors coming from _push.QueueNotification() call. Then I did exactly what the documented sample code did and it worked:
PushService _push = new PushService();
_push.Events.OnNotificationSendFailure += new ChannelEvents.NotificationSendFailureDelegate(Events_OnNotificationSendFailure);
_push.Events.OnNotificationSent += new ChannelEvents.NotificationSentDelegate(Events_OnNotificationSent);
var cert = File.ReadAllBytes(HttpContext.Current.Server.MapPath("..pathtokeyfile.p12"));
_push.StartApplePushService(new ApplePushChannelSettings(false, cert, "certpwd"));
AppleNotification notification = NotificationFactory.Apple()
.ForDeviceToken(deviceToken)
.WithAlert(message)
.WithSound("default")
.WithBadge(badge);
_push.QueueNotification(notification);
_push.StopAllServices(true);
Issue #1:
This works perfectly and I see the notification pop up on the iPhone. However, since it's called a Push Service, I assumed it would behave like a service - meaning, I instantiate it and call _push.StartApplePushService() within a Windows service perhaps. And I thought to actually queue up my notifications, I could do this on the front-end (admin app, let's say):
PushService push = new PushService();
AppleNotification notification = NotificationFactory.Apple()
.ForDeviceToken(deviceToken)
.WithAlert(message)
.WithSound("default")
.WithBadge(badge);
push.QueueNotification(notification);
Obviously (and like I already said), it didn't work - the last line kept throwing a null reference exception.
I'm having trouble finding any other kind of documentation that would show how to set this up in a service/client manner (and not just call everything at once). Is it possible or am I missing the point of how PushSharp should be utilized?
Issue #2:
Also, I can't seem to find a way to target many device tokens at once, without looping through them and queuing up notifications one at a time. Is that the only way or am I missing something here as well?
Thanks in advance.

#baramuse explained it all, if you wish to see a service "processor" you can browse through my solution on https://github.com/vmandic/DevUG-PushSharp where I've implemented the workflow you seek for, i.e. a win service, win processor or even a web api ad hoc processor using the same core processor.

From what I've read and how I'm using it, the 'Service' keyword may have mislead you...
It is a service in a way that you configure it once and start it.
From this point, it will wait for you to push new notifications inside its queue system and it will raise events as soon as something happens (delivery report, delivery error...). It is asynchronous and you can push (=queue) 10000 notifications and wait for the results to come back later using the event handlers.
But still it's a regular object instance you will have to create and access as a regular one. It doesn't expose any "outside listener" (http/tcp/ipc connection for example), you will have to build that.
In my project I created a small selfhosted webservice (relying on ServiceStack) that takes care about the configuration and instance lifetime while only exposing the SendNotification function.
And about the Issue #2, there indeed isn't any "batch queue" but as the queue function returns straight away (enqueue and push later) it's just a matter of a looping into your device tokens list...
public void QueueNotification(Notification notification)
{
if (this.cancelTokenSource.IsCancellationRequested)
{
Events.RaiseChannelException(new ObjectDisposedException("Service", "Service has already been signaled to stop"), this.Platform, notification);
return;
}
notification.EnqueuedTimestamp = DateTime.UtcNow;
queuedNotifications.Enqueue(notification);
}

How can I configure network access for the Windows Phone emulator?

I'm trying to debug an application that is making a WebRequest synchronously, ie.:
HttpWebRequest req = WebRequest.Create(new Uri("http://www.stackoverflow.com/")) as HttpWebRequest;
IAsyncResult res = req.BeginGetResponse(callback => { }, req);
while (!res.IsCompleted)
{
System.Threading.Thread.Sleep(100);
}
// Doesn't matter what's here, as `res.IsCompleted` never returns true
This is just to check that some of the application logic is "right", but it's getting stuck, with the IAsyncResult never reporting itself as complete.
To check, things, I tried to use Internet Explorer on the emulator, but found that is unable to find any webpages (including the built in favourites), which makes me think that the emulator is trying to use a specific network interface on my laptop, but there doesn't seem to be any way to configure it, or which interface to use? I have a suspicion that it may be trying to use a VPN interface, or a virtual adaptor like the one for VirtualBox. So, how can I configure it? additionally, would you expect requests made by the emulator to show up in Fiddler?
For the record, NetworkInterface.GetIsNetworkAvailable() returns true;
UPDATE:
It appears that updating my graphics driver (and associated reboot) allowed the emulator to access the real network (or at least guess the right adapter); however, res.IsCompleted still doesn't report true (and Fiddler shows the request has completed), so I'm a little confuddled.

Are you using a proxy? The Windows Phone emulator is tied to the currently active Internet Connection, as well as the proxy settings. Make sure those are set up correctly. Also, there might be a firewall blocking Internet access for XDE - check the settings too.
I would recommend getting Fiddler. Attempt to configure it to capture emulator traffic and see what information you can get from there.