private void CheckDisconnections()
{
int current = Epoch.Current();
int holdTimeSeconds = config.holdTime * 60;
foreach (KeyValuePair <ulong, int> pair in userDisconnectionTimes.ToArray())
{
if (Epoch.SecondsElapsed(current, pair.Value) >= holdTimeSeconds)
{
userDisconnectionTimes.Remove(pair.Key);
}
}
}