Merge pull request #116689 from SatishBoddu-MSFT/patch-2

(AzureCXP) Add an explicit note on C Service SDK deprecated

Author: PRMerger14

articles/iot-hub/iot-hub-devguide-sdks.md

@@ -112,6 +112,11 @@ Azure IoT Hub service SDK for Python:
 
 Azure IoT Hub service SDK for C: 
 
+The Azure IoT Service SDK for C is no longer under active development.
+We will continue to fix critical bugs such as crashes, data corruption, and security vulnerabilities. We will NOT add any new feature or fix bugs that are not critical, however.
+
+Azure IoT Service SDK support is available in higher-level languages ([C#](https://github.com/Azure/azure-iot-sdk-csharp), [Java](https://github.com/Azure/azure-iot-sdk-java), [Node](https://github.com/Azure/azure-iot-sdk-node), [Python](https://github.com/Azure/azure-iot-sdk-python)).
+
 * Download from [apt-get, MBED, Arduino IDE, or NuGet](https://github.com/Azure/azure-iot-sdk-c/blob/master/readme.md)
 * [Source code](https://github.com/Azure/azure-iot-sdk-c)