public class IotHubDeviceTwinHandler

{

    private TwinCollection _reportedProperties = new TwinCollection();

    public string IpAddress

    {

        get => _reportedProperties[PropertyNames.IpAddress] ?? string.Empty;

        set

        {

            if (value != IpAddress)    // check if this works as expected!

            {

                _reportedProperties[PropertyNames.IpAddress] = value;

                ReportProperties(); // <--------------- HOW TO DO THIS RIGHT?

            }

        }

    }

    public Task ReportProperties()

    {

        return _deviceState.DeviceClient.UpdateReportedPropertiesAsync(_reportedProperties);

    }

}