SendFcmV1NativeNotificationAsync is missing in INotificationHubClient

Question

SendFcmV1NativeNotificationAsync is missing in INotificationHubClient

Emanuele 0

I'm trying to use the dependency injection when using the NotificationHubClient, for this I'm trying to use the INotificationHubClient but there the method SendFcmV1NativeNotificationAsync is missing while it is available in it's implementation NotificationHubClient class.

In this way it is really hard to perform unit tests on the methods that are using SendFcmV1NativeNotificationAsync without transforming them into integration tests, but I don't want to create a resource just for test purpose

Vimal Lalani 1,820 Reputation points Microsoft External Staff Moderator

2025-09-29T08:21:39.25+00:00
Hi Emanuele

Based on the documentation and available interfaces, the method SendFcmNativeNotificationAsync is exposed in both NotificationHubClient and INotificationHubClient.

However, the method SendFcmV1NativeNotificationAsync is not defined in INotificationHubClient and NotificationHubClient.

For reference, you can review the official documentation here:

INotificationHubClient

NotificationHubClient

Could you share some more info,

Which version of the Microsoft.Azure.NotificationHubs package are you currently using?

Can you provide a snippet of your implementation where you are trying to use INotificationHubClient?

Emanuele 0

The version of the Microsoft.Azure.NotificationHubs package is 4.2.0

public class NotificationHubsService 
{
    private readonly INotificationHubClient _notificationHubClient;
    public NotificationHubsService(INotificationHubClient notificationHubClient)
    {
        _notificationHubClient = notificationHubClient;
    }
    public async Task SendAndroidNotificationAsync(string title, string body, PublicNotificationObject notification)
    {
        var androidNotificationFcmV1 = new AndroidNotificationFcmV1Object()
        {
            Message = new AndroidNotificationFcmV1MessageObject()
            {
                Notification = new NotificationInfoObject()
                {
                    Title = title,
                    Body = body
                },
                Data = new NotificationDataFcmV1Object()
                {
                    Type = notification.NotificationType,
                    Context_code = notification.ContextOwner.ToString(),
                    Conversation_id = notification.NotificationId.ToString(),
                    DocumentKey = notification.DocumentKey == null ? null : JsonSerializer.Serialize(notification.DocumentKey, _options)
                }
            }
        };
        string androidNotificationFcmV1Content = JsonSerializer.Serialize(androidNotificationFcmV1);
        _ = await _notificationHubClient.SendFcmV1NativeNotificationAsync(androidNotificationFcmV1Content, notification.DriverPhoneNumber);
    }
}

Here the SendFcmV1NativeNotificationAsync method is marked as error

User's image

while it is not if I directly use the class instead of the interface

User's image

Even if in the documentation it looks like it is not defined, it actually is

1 answer

Your answer

Vimal Lalani 1,820 Reputation points Microsoft External Staff Moderator

2025-09-29T08:21:39.25+00:00

Hi Emanuele

Based on the documentation and available interfaces, the method SendFcmNativeNotificationAsync is exposed in both NotificationHubClient and INotificationHubClient.

However, the method SendFcmV1NativeNotificationAsync is not defined in INotificationHubClient and NotificationHubClient.

For reference, you can review the official documentation here:

INotificationHubClient

NotificationHubClient

Could you share some more info,

Which version of the Microsoft.Azure.NotificationHubs package are you currently using?

Can you provide a snippet of your implementation where you are trying to use INotificationHubClient?
Emanuele 0 Reputation points

2025-09-30T07:17:46.5766667+00:00

The version of the Microsoft.Azure.NotificationHubs package is 4.2.0

public class NotificationHubsService { private readonly INotificationHubClient _notificationHubClient; public NotificationHubsService(INotificationHubClient notificationHubClient) { _notificationHubClient = notificationHubClient; } public async Task SendAndroidNotificationAsync(string title, string body, PublicNotificationObject notification) { var androidNotificationFcmV1 = new AndroidNotificationFcmV1Object() { Message = new AndroidNotificationFcmV1MessageObject() { Notification = new NotificationInfoObject() { Title = title, Body = body }, Data = new NotificationDataFcmV1Object() { Type = notification.NotificationType, Context_code = notification.ContextOwner.ToString(), Conversation_id = notification.NotificationId.ToString(), DocumentKey = notification.DocumentKey == null ? null : JsonSerializer.Serialize(notification.DocumentKey, _options) } } }; string androidNotificationFcmV1Content = JsonSerializer.Serialize(androidNotificationFcmV1); _ = await _notificationHubClient.SendFcmV1NativeNotificationAsync(androidNotificationFcmV1Content, notification.DriverPhoneNumber); } }

Here the SendFcmV1NativeNotificationAsync method is marked as error

while it is not if I directly use the class instead of the interface

Even if in the documentation it looks like it is not defined, it actually is

Answer 1

Hi Emanuele

Yes, I got the point.

The official documentation for Microsoft.Azure.NotificationHubs (v4.1.0) is available, but it does not include the SendFcmV1NativeNotificationAsync method. In version 4.2.0, the method is available in the concrete class but not in the interface.

Would it be possible to create a new interface and class structure like this:

INotificationHubV1Client inherits from INotificationHubClient

NotificationHubV1Client inherits from NotificationHubClient and implements INotificationHubV1Client

This way, you can extend the functionality without breaking the existing interface.

public interface INotificationHubV1Client : INotificationHubClient
{
    public Task<NotificationOutcome> SendFcmV1NativeNotificationAsync(string jsonPayload);
}
public class NotificationHubV1Client : NotificationHubClient, INotificationHubV1Client
{
    public NotificationHubV1Client(string connectionString, string notificationHubPath) : base(connectionString, notificationHubPath)
    {
    }
}

and then.

INotificationHubV1Client _notificationHubClient = new NotificationHubV1Client("", "");
await _notificationHubClient.SendFcmV1NativeNotificationAsync("");

Emanuele 0 Reputation points

2025-09-30T08:56:18.0966667+00:00

I can do it, but then it will ever be fixed?
Vimal Lalani 1,820 Reputation points Microsoft External Staff Moderator

2025-10-03T08:32:30.2366667+00:00

Hi Emanuele

As Per Doc NotificationHubClient you can open issue https://github.com/Azure/azure-sdk-for-net/issues.

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SendFcmV1NativeNotificationAsync is missing in INotificationHubClient

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