System.Object
   OpcLabs.BaseLib.Object2
      OpcLabs.BaseLib.Info
         OpcLabs.BaseLib.OperationModel.OperationArguments
            OpcLabs.EasyOpc.UA.OperationModel.UANodeArguments
               OpcLabs.EasyOpc.UA.OperationModel.UAAttributeArguments
                  OpcLabs.EasyOpc.UA.OperationModel.UAMonitoredItemArguments
                     OpcLabs.EasyOpc.UA.OperationModel.EasyUAMonitoredItemArguments
                        OpcLabs.EasyOpc.UA.Generic.EasyUADataChangeArguments<TValue>
         OpcLabs.BaseLib.OperationModel.OperationResult
            OpcLabs.EasyOpc.UA.OperationModel.UAAttributeDataResult
               OpcLabs.EasyOpc.UA.Generic.UAAttributeDataResult<T>
         OpcLabs.EasyOpc.UA.UADataValue
            OpcLabs.EasyOpc.UA.UAAttributeData
               OpcLabs.EasyOpc.UA.Generic.UAAttributeData<TValue>
   System.EventArgs
      OpcLabs.BaseLib.OperationModel.OperationEventArgs
         OpcLabs.EasyOpc.UA.OperationModel.EasyUAMonitoredItemChangedEventArgs
            OpcLabs.EasyOpc.UA.OperationModel.EasyUADataChangeNotificationEventArgs
               OpcLabs.EasyOpc.UA.Generic.EasyUADataChangeNotificationEventArgs<TValue>

Reference

OpcLabs.EasyOpcUA Assembly