Hi everybody,
I'm trying to build an example dataAdapter. I start out creating a new Project (windows application c#) in Visual Studio 2003,and copy DotNetAdapter.dll from "DOCS-SDKs\sdk_adapter_dotnet\lib\dotnet_1.1" into my directory project, add reference "DotNetAdapter.dll", and then I have created 2 class "ExternalFeed.cs", "StockList.cs" (just only copy & paste from source code demo in folder "DOCS-SDKs\sdk_adapter_dotnet\examples\DotNetStockListDe mo\src_data_adapter").

There are my code :
----------------------
ExternalFeed.cs
----------------------
using System;
using System.Threading;
using System.Collections;
namespace Lightstreamer.Adapters.Data
{
///<summary>
/// Summary description for ExternalFeed.
///</summary>
publicclass ExternalFeed
{
///<summary>
/// Used by the Stock List Adapter to receive data from the simulated broadcast feed in an
/// asynchronous way, through the OnEvent method.
///</summary>
publicinterface IExternalFeedListener
{

///<summary>
/// Called by the feed for each update event occurrence on some stock.
/// If isSnapshot is true, then the event contains a full snapshot,
/// with the current values of all fields for the stock.
///</summary>
void OnEvent(string itemName, IDictionary currentValues, bool isSnapshot);
}
///<summary>
/// Used to automatically generate the updates for the 30 stocks:
/// mean and standard deviation of the times between consecutive
/// updates for the same stock.
///</summary>
privatedouble [] _updateTimeMeans;
privatedouble [] _updateTimeStdDevs;
///<summary>
/// Used to generate the initial field values for the 30 stocks
///</summary>
privatedouble [] _refprices;
privatedouble [] _openprices;
privatedouble [] _minprices;
privatedouble [] _maxprices;
privatestring [] _stockNames;

///<summary>
/// Used to keep the contexts of the 30 stocks.
///</summary>
private IDictionary _stockGenerators;
private IExternalFeedListener _listener;
private IList _snapshotQueue;
private Thread _snapshotSender;

public ExternalFeed()
{
_stockGenerators=
new Hashtable();
_snapshotQueue=
new ArrayList();
_updateTimeMeans =
newdouble [] {30000, 500, 3000, 90000,
7000, 10000, 3000, 7000,
7000, 7000, 500, 3000,
20000, 20000, 20000, 30000,
500, 3000, 90000, 7000,
10000, 3000, 7000, 7000,
7000, 500, 3000, 20000,
20000, 20000 };
...
publicclass ExternalFeedProducer
{
publicstring _itemName;
privateint _open, _refer, _last, _min, _max, _other;
privatedouble _mean, _stddev;
privatestring _stockName;

private Random _random;
privatebool _haveNextNextGaussian;
privatedouble _nextNextGaussian;
private IExternalFeedListener _listener;
private Thread _thread;
///<summary>
/// Initializes stock data based on the already prepared values.
///</summary>
public ExternalFeedProducer(string name,
double openPrice, double referPrice, double minPrice, double maxPrice,
double updateTimeMean, double updateTimeStdDev, string stockName)
{
_itemName = name;
_open = (
int) Math.Round(openPrice * 100);
_refer = (
int) Math.Round(referPrice * 100);
_min = (
int) Math.Ceiling(minPrice * 100);
_max = (
int) Math.Floor(maxPrice * 100);
_last = _open;
_mean = updateTimeMean;
_stddev = updateTimeStdDev;
_stockName = stockName;

_random =
new Random();
_haveNextNextGaussian=
false;
_nextNextGaussian= 0.0;
ComputeNewValues();
}
...
publicvoid SetFeedListener(IExternalFeedListener listener)
{
lock (this)
{
_listener = listener;
}
}

-------------------------
StockList.cs
-------------------------
using System;
using System.Collections;
using System.Threading;
using Lightstreamer.Interfaces.Data;
namespace Lightstreamer.Adapters.Data
{
///<summary>
/// Summary description for StockList.
///</summary>
publicclass StockListAdapter : IDataProvider, IExternalFeedListener
{
private IDictionary _subscribedItems;
private ExternalFeed _myFeed;
private IItemEventListener _listener;
public StockListAdapter()
{
_subscribedItems=
new Hashtable();

_myFeed=
new ExternalFeedSimulator();
}

// ////////////////////////////////////////////////////////////////////////
// IDataProvider methos
publicvoid Init(IDictionary parameters, string configFile)
{
_myFeed.SetFeedListener(
this);
_myFeed.Start();
}
...

Now I build this application, it has error :

D:\My projects\AnalyzeStockApp\Lightstreamer.Adapters.Da ta\ExternalFeed.cs(218): The type or namespace name 'IExternalFeedListener' could not be found (are you missing a using directive or an assembly reference?) --> (red color line is mark)

Could anybody help me?