Consultative transfer using graph api .net sdk and the ongoing call after transfer

[bfany365]

Hi.

I am using Graph API .net sdk to accept incoming call. Lets say the incoming call is A and then I do make another call to ask if an agent can join (call it B) to call A.

This works fine and I can see the participant in call A are now in a call with participant in B.

var transferTarget1 = new InvitationParticipantInfo {
ReplacesCallId = call_B.Id.ToString(),
Identity = agentIdinCallB
};

await (_callA).TransferAsync(transferTarget1);

However, I see that _callA and _callB are Terminated now I tried the other way :

var transferTarget1 = new InvitationParticipantInfo {
ReplacesCallId = call_A.Id.ToString(),
Identity = agentIdinCallB
};
await (_callB).TransferAsync(transferTarget1);

However, I see that _callA and _callB are Terminated.

I need to keep track of the incoming call for Observability proposes and later add participants to it, but now it does not let me do that. Does calling TransferAsync makes new a call object ?