Visualizing Live and Historic Stock Data Using Silverlight

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace StockVisualization
{
    public interface ILiveStockDataQuerier
    {
        /// <summary>
        /// Event fired when the subscribed stock price has changed
        /// </summary>
        event StockDataEventHandler<LiveStockData> OnDataUpdated;

        /// <summary>
        /// Subscribes to the stock, constantly queries it and fires updates when it has changed
        /// </summary>
        /// <param name="stockCode"></param>
        void Subscribe(string stockCode);
    }
}