public void DisconnectData(int TopicId)
{
int contractId = TopicsToContractIds[TopicId];
TopicsToContractIds.Remove(TopicId);
TopicsToTickTypes.Remove(TopicId);
if (TopicsToContractIds.Where(x => x.Value == contractId).Count() == 0)
{
XL_RTD.DataSource.Unsubscribe(XLOM.GetById <Contract>(contractId));
}
}
