New LTS release for Azure IoT Hub SDK for .NET
Published May 04 2021 11:27 AM 1,763 Views

The .NET Azure IoT Hub SDK team released the latest LTS (Long-Term Support) of the device and service SDKs for .NET. This LTS version, tagged lts_2021-2-18, adds bug fixes, some improvements, and new features over the previous LTS (lts_2020-9-23), such as:

- Handle twin failures using AMQP.

- Make the DeviceClient and ModuleClient extensible.

- Install the device chain certificates using the SDK.

- Make DPS class ClientWebSocketChannel disposable.

- Use CultureInvariant for validating device connection string values.

- Reduce memory footprint of CertificateInstaller.

- Add an API to set a callback for receiving C2D.

- Make set desired property update method thread safe.

- Add support for disabling callbacks for properties and methods.

- Expose DTDL model Id property for pnp devices.

- Make payload in the invoke command API optional.

- Add APIs to get attestation mechanism.

- Improved logging for noting when the no-retry policy is enabled, in the MQTT/AMQP/HTTP transport layers, in the HttpRegistryManager, and in the AmqpServiceClient.


For detailed list of feature and bug fixes please consult the comparing changes with previous LTS: Comparing lts_2020-9-23...lts_2021-3-18 · Azure/azure-iot-sdk-csharp (

The following NuGet versions have been marked as LTS.

  • Microsoft.Azure.Devices: 1.31.0
  • Microsoft.Azure.Devices.Client: 1.36.0
  • Microsoft.Azure.Devices.Shared: 1.27.0
  • Microsoft.Azure.Devices.Provisioning.Client: 1.16.3
  • Microsoft.Azure.Devices.Provisioning.Transport.Amqp: 1.13.4
  • Microsoft.Azure.Devices.Provisioning.Transport.Http: 1.12.3
  • Microsoft.Azure.Devices.Provisioning.Transport.Mqtt: 1.14.0
  • Microsoft.Azure.Devices.Provisioning.Security.Tpm: 1.12.3
  • Microsoft.Azure.Devices.Provisioning.Service: 1.16.3


More detail on the LTS 2021-03-18 version can be found here.


Enjoy this new LTS version.

Eric for the Azure IoT .NET Managed SDK team

Version history
Last update:
‎May 04 2021 11:54 AM
Updated by: