/// <summary>
 /// 获取所有的交易规则_交易方向_交易单位_交易量(最小交易单位)
 /// </summary>
 /// <returns></returns>
 private IList <XH_MinVolumeOfBusiness> GetAllMinVolumeOfBusinessFromWCF()
 {
     try
     {
         using (SpotTradeRulesClient client = GetClient())
             return(client.GetAllMinVolumeOfBusiness());
     }
     catch (Exception ex)
     {
         string errCode = "GT-8103";
         string errMsg  = "无法从管理中心获取交易规则最小交易单位列表。";
         throw new VTException(errCode, errMsg, ex);
     }
 }