private void Active()
{
// if less than 30 seconds since mouse was moved last time - define as active
var activeSpan = DateTime.Now - LastActivity;
if (activeSpan.TotalSeconds < 30)
{
TimeActive = TimeActive.Add(activeSpan);
}
LastActivity = DateTime.Now;
}
public void Add(double seconds)
{
TimeActive = TimeActive.Add(TimeSpan.FromSeconds(seconds));
}