//This event handler runs when a PriceChange event is raised.
//The client's PriceChange service operation is invoked to provide notification about the price change.
public void MarketChangeHandler(object sender, MarketData newData)
{
callback.GetMarketData(newData);
}
public void GetMarketData(MarketData marketdata)
{
}
//Information source clients call this service operation to report a price change.
//A price change event is raised. The price change event handlers for each subscriber will execute.
public void PublishMarketData(MarketData newData)
{
MarketDataChangeEvent(this, newData);
}