Updated steps and code samples

Author: gsteve88

includes/iot-hub-howto-auth-device-cert-dotnet.md

@@ -8,34 +8,22 @@ ms.service: iot-hub
 ms.devlang: csharp
 ms.topic: include
 ms.manager: lizross
-ms.date: 11/19/2024
+ms.date: 12/12/2024
 ms.custom: mqtt, devx-track-csharp, devx-track-dotnet
 ---
 
 To connect a device to IoT Hub using an X.509 certificate:
 
-1. Use [DeviceAuthenticationWithX509Certificate](/dotnet/api/microsoft.azure.devices.client.deviceauthenticationwithx509certificate) to create an object that contains certificate information that is passed to `Create` (step 2).
+1. Use [DeviceAuthenticationWithX509Certificate](/dotnet/api/microsoft.azure.devices.client.deviceauthenticationwithx509certificate) to create an object that contains device and certificate information that is passed as the second parameter to `DeviceClient.Create` (step 2).
 
-2. Use [Create](/dotnet/api/microsoft.azure.devices.client.deviceclient.create?#microsoft-azure-devices-client-deviceclient-create(system-string-microsoft-azure-devices-client-iauthenticationmethod)) to connect the device to IoT Hub using an X.509 certificate.
+1. Use [DeviceClient.Create](/dotnet/api/microsoft.azure.devices.client.deviceclient.create?#microsoft-azure-devices-client-deviceclient-create(system-string-microsoft-azure-devices-client-iauthenticationmethod)) to connect the device to IoT Hub using an X.509 certificate.
 
 This example shows certificate input parameter values as local variables for clarity. In a production system, store sensitive input parameters in environment variables or another more secure storage location. For example, use `Environment.GetEnvironmentVariable("HOSTNAME")` to read the host name environment variable.
 
+In this example, the `auth` `DeviceAuthenticationWithX509Certificate` object has been populated with device and certificate information and is passed as to `DeviceClient.Create`. An example of `DeviceAuthenticationWithX509Certificate` information population has been omitted because of the flexible nature of how the certificate information can be added.
+
 ```csharp
-RootCertPath = "~/certificates/certs/sensor-thl-001-device.cert.cer";
-Intermediate1CertPath = "";
-Intermediate2CertPath = "";
-DevicePfxPath = "~/certificates/certs/sensor-thl-001-device.cert.pfx";
-DevicePfxPassword = "1234";
-DeviceName = "MyDevice";
 HostName = "xxxxx.azure-devices.net";
-
-var chainCerts = new X509Certificate2Collection();
-chainCerts.Add(new X509Certificate2(RootCertPath));
-chainCerts.Add(new X509Certificate2(Intermediate1CertPath));
-chainCerts.Add(new X509Certificate2(Intermediate2CertPath));
-using var deviceCert = new X509Certificate2(DevicePfxPath, DevicePfxPassword);
-using var auth = new DeviceAuthenticationWithX509Certificate(DeviceName, deviceCert, chainCerts);
-
 using var deviceClient = DeviceClient.Create(
     HostName,
     auth,
@@ -46,7 +34,14 @@ For more information about certificate authentication, see:
 
 * [Authenticate identities with X.509 certificates](/azure/iot-hub/authenticate-authorize-x509)
 * [Create and upload certificates for testing](/azure/iot-hub/tutorial-x509-test-certs)
+* [X509Certificate2Collection](/dotnet/api/system.security.cryptography.x509certificates.x509certificate2collection)
+* [X509Certificate2](/dotnet/api/system.security.cryptography.x509certificates.x509certificate2)
+* [Tutorial: Provision multiple X.509 devices using enrollment groups](/azure/iot-dps/tutorial-custom-hsm-enrollment-group-x509?pivots=programming-language-java)
 
 ##### Code samples
 
-For a working sample of device X.509 certificate authentication, see [Connect with X.509 certificate](https://github.com/Azure/azure-iot-sdk-csharp/tree/main/iothub/device/samples/how%20to%20guides/X509DeviceCertWithChainSample).
+For working samples of device X.509 certificate authentication, see:
+
+* [Connect with X.509 certificate](https://github.com/Azure/azure-iot-sdk-csharp/tree/main/iothub/device/samples/how%20to%20guides/X509DeviceCertWithChainSample)
+* [DeviceClientX509AuthenticationE2ETests](https://github.com/Azure/azure-iot-sdk-csharp/blob/main/e2e/test/iothub/DeviceClientX509AuthenticationE2ETests.cs)
+* [Guided project - Provision IoT devices securely and at scale with IoT Hub Device Provisioning Service](https://learn.microsoft.com/en-us/training/modules/provision-iot-devices-secure-scale-with-iot-hub-dps/)

includes/iot-hub-howto-auth-device-cert-java.md

@@ -8,7 +8,7 @@ ms.service: iot-hub
 ms.devlang: java
 ms.topic: include
 ms.manager: lizross
-ms.date: 11/19/2024
+ms.date: 12/12/2024
 ---
 
 To connect a device to IoT Hub using an X.509 certificate:

includes/iot-hub-howto-auth-device-cert-node.md

@@ -8,7 +8,7 @@ ms.service: iot-hub
 ms.devlang: python
 ms.topic: include
 ms.manager: lizross
-ms.date: 12/06/2024
+ms.date: 12/12/2024
 ---
 
 The X.509 certificate is attached to the device-to-IoT Hub connection transport.

includes/iot-hub-howto-file-upload-dotnet.md

@@ -7,7 +7,7 @@ ms.author: kgremban
 ms.service: azure-iot-hub
 ms.devlang: csharp
 ms.topic: include
-ms.date: 07/01/2024
+ms.date: 12/12/2024
 ms.custom: mqtt, devx-track-csharp, devx-track-dotnet
 ---