public Task CloseAsync()
{
if (_socket == null)
{
throw new InvalidOperationException("Close failed, must connect first.");
}
else
{
_tokenSource.Cancel();
_tokenSource.Dispose();
_socket.Abort();
_socket.Dispose();
_socket = null;
OnClosed?.Invoke(ServerCloseReason.ClosedByClient);
return(Task.CompletedTask);
}
}
