Implementing Observer pattern in .NET

using System;
using System.Collections.Generic;
using System.Text;

namespace ObserverPattern
{
    class CurrencyRateChangeInfo
    {
        public string sCurrencyName;  // name of the currency
        public double dNewRate;  // new rate value
        public DateTime tChangeTime;

        public CurrencyRateChangeInfo(string name, double rate, DateTime time)
        {
            sCurrencyName = name;
            dNewRate = rate;
            tChangeTime = time;
        }

    }
}