Starting device stream request using Azure IoT Hub

iothub-device-streams-request.cs

var serviceClient = ServiceClient.CreateFromConnectionString(
    serviceConnectionString, 
    TransportType.Amqp);

var deviceStreamRequest = new DeviceStreamRequest("ServiceStream");

var result = await serviceClient.CreateStreamAsync(
    deviceId, 
    deviceStreamRequest, 
    cancellationTokenSource.Token).ConfigureAwait(false);