System.Object
   QuantConnect.Data.BaseData
      QuantConnect.Data.Auxiliary.ZipEntryName
      QuantConnect.Data.Custom.DailyFx
      QuantConnect.Data.Custom.FxcmVolume
      QuantConnect.Data.DynamicData
         QuantConnect.Data.Custom.Quandl
            QuantConnect.Python.PythonQuandl
         QuantConnect.Python.PythonData
      QuantConnect.Data.Fundamental.CompanyReference
      QuantConnect.Data.Fundamental.EarningRatios
      QuantConnect.Data.Fundamental.EarningReports
      QuantConnect.Data.Fundamental.FinancialStatements
      QuantConnect.Data.Fundamental.FineFundamental
      QuantConnect.Data.Fundamental.OperationRatios
      QuantConnect.Data.Fundamental.SecurityReference
      QuantConnect.Data.Fundamental.ValuationRatios
      QuantConnect.Data.Market.Delisting
      QuantConnect.Data.Market.Dividend
      QuantConnect.Data.Market.FuturesChain
      QuantConnect.Data.Market.IntraDayDividendSplit
      QuantConnect.Data.Market.OptionChain
      QuantConnect.Data.Market.QuoteBar
      QuantConnect.Data.Market.RenkoBar
      QuantConnect.Data.Market.Split
      QuantConnect.Data.Market.SymbolChangedEvent
      QuantConnect.Data.Market.Tick
         QuantConnect.Data.Market.OpenInterest
      QuantConnect.Data.Market.TradeBar
      QuantConnect.Data.UniverseSelection.BaseDataCollection
         QuantConnect.Data.UniverseSelection.FuturesChainUniverseDataCollection
         QuantConnect.Data.UniverseSelection.OptionChainUniverseDataCollection
      QuantConnect.Data.UniverseSelection.CoarseFundamental
      QuantConnect.Indicators.IndicatorDataPoint
   QuantConnect.Data.HistoryRequest
   QuantConnect.Data.Slice
   QuantConnect.Data.SliceExtensions
   QuantConnect.Data.SubscriptionDataConfig
   QuantConnect.Data.SubscriptionDataSource
   QuantConnect.Data.SubscriptionManager
   System.Collections.Generic.List<T>
      QuantConnect.Data.SubscriptionDataConfigList

Reference

QuantConnect.Common Assembly