void MeasureBandwidthUseRates() {
int sentDelta = bytesSent - lastBytesSent;
int receivedDelta = bytesReceived - lastBytesReceived;
TimeSpan timeDelta = DateTime.UtcNow.Subtract( lastMeasurementDate );
BytesSentRate = sentDelta / timeDelta.TotalSeconds;
BytesReceivedRate = receivedDelta / timeDelta.TotalSeconds;
lastBytesSent = bytesSent;
lastBytesReceived = bytesReceived;
lastMeasurementDate = DateTime.UtcNow;
}