diff --git a/.dotnet/README.md b/.dotnet/README.md
index 122070d2c..1513d65ec 100644
--- a/.dotnet/README.md
+++ b/.dotnet/README.md
@@ -414,8 +414,12 @@ completion = client.CompleteChat(messages, options);
 PrintAudioContent();
 ```
 
-Streaming is virtually identical: items in `StreamingChatCompletionUpdate.ContentUpdate` will provide incremental chunks of data via
-`AudioBytes` and `AudioTranscript`.
+Streaming is highly parallel: `StreamingChatCompletionUpdate` instances can include a `ResponseAudioUpdate` that may
+contain any of:
+
+- The `Id` of the streamed audio content, which can be referenced by subsequent `AssistantChatMessage` instances via `ChatAudioReference` once the streaming response is complete; this may appear across multiple `StreamingChatCompletionUpdate` instances but will always be the same value when present
+- The `ExpiresAt` value that describes when the `Id` will no longer be valid for use with `ChatAudioReference` in subsequent requests; this typically appears once and only once, in the final `StreamingResponseAudioUpdate`
+- Incremental `TranscriptUpdate` and/or `DataUpdate` values, which can incrementally consumed and, when concatenated, form the complete audio transcript and audio output for the overall response; many of these typically appear
 
 ## How to generate text embeddings
 
diff --git a/.dotnet/tests/Chat/ChatTests.cs b/.dotnet/tests/Chat/ChatTests.cs
index bf98864f9..c20df8200 100644
--- a/.dotnet/tests/Chat/ChatTests.cs
+++ b/.dotnet/tests/Chat/ChatTests.cs
@@ -430,7 +430,7 @@ public async Task ChatWithAudio()
                 if (responseAudioUpdate.Id is not null)
                 {
                     Assert.That(streamedCorrelationId, Is.Null.Or.EqualTo(streamedCorrelationId));
-                    streamedCorrelationId = responseAudioUpdate.Id;
+                    streamedCorrelationId ??= responseAudioUpdate.Id;
                 }
                 if (responseAudioUpdate.ExpiresAt.HasValue)
                 {