private void RemoveExport(Security security, MarketDataTypes type)
{
if (security == null)
{
throw new ArgumentNullException("security");
}
_exports.SyncDo(d =>
{
var types = d.TryGetValue(security);
if (types == null)
{
return;
}
types.Remove(type);
});
base.UnSubscribeMarketData(security, type);
}