/// <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()
{
_dlValue = DlCounter.NextSample().RawValue;
_ulValue = UlCounter.NextSample().RawValue;
// Calculates download and upload speed.
_dlSpeed = _dlValue - _dlValueOld;
_ulSpeed = _ulValue - _ulValueOld;
_dlValueOld = _dlValue;
_ulValueOld = _ulValue;
}
internal PerformanceCounter DlCounter, UlCounter; // Performance counters to monitor download and upload speed.
/// <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.
_dlValueOld = DlCounter.NextSample().RawValue;
_ulValueOld = UlCounter.NextSample().RawValue;
}