Azure/azure-sdk-for-net Azure.Core

1.58.0 (2026-06-04)

Fixed NullReferenceException thrown by Operation.RehydrateAsync / ArmOperation.RehydrateAsync (and the resulting operation's UpdateStatusAsync / Value) when the rehydrated long-running operation has completed with a failure. OperationState.Failure and OperationState<T>.Failure now honor their documented contract and materialize a default RequestFailedException from the raw response when the caller passes null, matching the behavior of the non-rehydration polling path.
Fixed DiagnosticScope to mark the parent ActivityContext as remote (IsRemote = true) when a traceparent is provided via SetTraceContext or AddLink. The traceparent in these paths is always extracted from an external source (e.g. a messaging broker's application properties), so samplers that distinguish local vs. remote parents — such as the RateLimitedSampler used by the Azure Monitor OpenTelemetry exporter — can now make correct decisions for activities started from incoming messages.