/// <summary>
/// Obtain new sample from performance counters, and refresh the values saved in dlSpeed, ulSpeed, etc.
/// This method is supposed to be called only in NetworkMonitor, one time every second.
/// </summary>
internal void refresh()
{
_downloadValue = DownLoadCounter.NextSample().RawValue;
_uploadValue = UpLoadCounter.NextSample().RawValue;
// Calculates download and upload speed.
DownloadSpeed = _downloadValue - _downloadValueOld;
UploadSpeed = _uploadValue - _uploadValueOld;
_downloadValueOld = _downloadValue;
_uploadValueOld = _uploadValue;
}
/// <summary>
/// Preparations for monitoring.
/// </summary>
internal void init()
{
// Since dlValueOld and ulValueOld are used in method refresh() to calculate network speed, they must have be initialized.
_downloadValueOld = DownLoadCounter.NextSample().RawValue;
_uploadValueOld = UpLoadCounter.NextSample().RawValue;
}