We will be creating a simulated IoT device to send telemetry data and read that in the cloud application:

1. Create a console application in the Visual Studio simulated device.
2. Add the Azure.Devices package from NuGet.
3. Create an event hub client connection using the following code:

eventHubClient = EventHubClient.CreateFromConnectionString(AzureIoTHub.GetConnectionString(), iotHubD2cEndpoint);

4. Scan through all partitions of the event hub:

var d2cPartitions = eventHubClient.GetRuntimeInformation().PartitionIds;
String data = "";
foreach (string partition in d2cPartitions)
{
 var result = ReceiveMessagesFromDeviceAsync(partition);

 data = result.Result.ToString();
 if (data != "")
 return data;
}

return data;

5. lets use following code for reading the messages sent by the device:

var eventHubReceiver = eventHubClient.GetDefaultConsumerGroup().CreateReceiver(partition, DateTime.Now);
while (true)
{
 EventData eventData = await eventHubReceiver.ReceiveAsync();
 if (eventData == null) continue;
 var data = Encoding.UTF8.GetString(eventData.GetBytes());
 return data;
}