Using C# to Answer call, it does not trigger OnUpdated, but "state": "established" or "Terminated" when calling the api

[bfany365]

Hi.

Project: Developed on .NET 4.8
Microsoft.Graph.Communications.Calls: 1.2.0.10563
Microsoft.Graph: 5.38.0

I use AnswerAsync from "Microsoft.Graph.Communications.Calls.ICall" in C#, but it never triggers call.OnUpdated:

private void handleCall(){
   call.OnUpdated += triggerupdatecall;
     await call.AnswerAsync(GetMediaConfig(), new []{Microsoft.Graph.Models.Modality.Audio});
}

private static MediaConfig GetMediaConfig() {
            var mediaToPrefetch = new List<MediaInfo>();

            return new ServiceHostedMediaConfig {
PreFetchMedia = mediaToPrefetch
            };
        }

However sometimes when I call the REST api I see that state is "established".
The response from the api :

"@odata.context": "https://graph.microsoft.com/v1.0/$metadata#communications/calls/$entity",
"id": "0b005180-12de-42ca-b80d-ab14c81cf45d",
"state": "established"

Or sometimes I see it is Terminated, but I can only see that when I hook to the "ICommunicationsClient.Calls().OnUpdated += BotEndpoint_OnUpdate;" which is different than "call.OnUpdated":

private void BotEndpoint_OnUpdate(ICallCollection sender, CollectionEventArgs<Microsoft.Graph.Communications.Calls.ICall> e) {
    foreach (var call in e.RemovedResources) {
                
    }
}

Can you help please ?

[bfany365]

The problem was CallBasckUrl.
This question can be removed.