public void SubscribeQuotes(IQuoteSink sink)
{
if (_sink != null)
throw new InvalidOperationException("Already subscribed");
if (sink == null)
throw new ArgumentNullException("sink");
_sink = sink;
_sink.SubscribeMarket(_info.Uid);
}
public void UnsubscribeQuotes()
{
if (_sink == null)
throw new InvalidOperationException("Not subscribed");
_sink.UnsubscribeMarket(_info.Uid);
_sink = null;
}