I am exploring MAUI on macOS. I am porting a WPF application to evaluate the functionalities. The application is connecting to an Azure IoT Hub instance.
Here is the section of code that seems problematic:
var iotHubConnectionStringBuilder = IotHubConnectionStringBuilder.Create("HostName=<iotHubConnectionString>");
var registryManager = RegistryManager.CreateFromConnectionString(iotHubConnectionStringBuilder.ToString());
When calling CreateFromConnectionString, the following exception is thrown:
Unhandled Exception:
System.PlatformNotSupportedException: Operation is not supported on this platform.
at System.Net.Http.NSUrlSessionHandler.set_SslProtocols(SslProtocols value)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
--- End of stack trace from previous location ---
at System.Net.Http.HttpClientHandler.InvokeNativeHandlerMethod(String name, Object[] parameters)
at System.Net.Http.HttpClientHandler.SetSslProtocols(SslProtocols value)
at System.Net.Http.HttpClientHandler.set_SslProtocols(SslProtocols value)
at Microsoft.Azure.Devices.Client.Transport.HttpClientHelper..ctor(Uri baseAddress, IAuthorizationProvider authenticationHeaderProvider, IDictionary`2 defaultErrorMapping, TimeSpan timeout, Action`1 preRequestActionForAllRequests, X509Certificate2 clientCert, HttpClientHandler httpClientHandler, ProductInfo productInfo, IWebProxy proxy, Boolean isClientPrimaryTransportHandler)
at Microsoft.Azure.Devices.Client.Transport.HttpTransportHandler..ctor(IPipelineContext context, IotHubConnectionString iotHubConnectionString, Http1TransportSettings transportSettings, HttpClientHandler httpClientHandler, Boolean isClientPrimaryTransportHandler)
at Microsoft.Azure.Devices.Client.InternalClient..ctor(IotHubConnectionString iotHubConnectionString, ITransportSettings[] transportSettings, IDeviceClientPipelineBuilder pipelineBuilder, ClientOptions options)
at Microsoft.Azure.Devices.Client.ClientFactory.CreateFromConnectionString(String connectionString, IAuthenticationMethod authenticationMethod, ITransportSettings[] transportSettings, IDeviceClientPipelineBuilder pipelineBuilder, ClientOptions options)
at Microsoft.Azure.Devices.Client.ClientFactory.CreateFromConnectionString(String connectionString, IAuthenticationMethod authenticationMethod, TransportType transportType, IDeviceClientPipelineBuilder pipelineBuilder, ClientOptions options)
at Microsoft.Azure.Devices.Client.ClientFactory.CreateFromConnectionString(String connectionString, TransportType transportType, ClientOptions options)
at Microsoft.Azure.Devices.Client.ClientFactory.CreateFromConnectionString(String connectionString, ClientOptions options)
at Microsoft.Azure.Devices.Client.DeviceClient.<>c__DisplayClass8_0.<CreateFromConnectionString>b__0()
at Microsoft.Azure.Devices.Client.DeviceClient.Create(Func`1 internalClientCreator)
at Microsoft.Azure.Devices.Client.DeviceClient.CreateFromConnectionString(String connectionString, ClientOptions options)
[..]
I have played with the different HttpClient implementation without any positive outcome. And, surprinsingly enough, it exhibits the same callstack, with NSUrlSessionHandler.set_SslProtocols on top of it:
Question
Why is this error thrown and how can it be fixed?
