source: BMXNET_RPMS_dotNET_UTILITIES-BMX/branch/IHS BMX Framework/lib/NUnit/NUnit-2.5.10.11092/samples/csharp/money/Money.cs@ 1146

// ****************************************************************
// This is free software licensed under the NUnit license. You
// may obtain a copy of the license as well as information regarding
// copyright ownership at http://nunit.org/?p=license&r=2.4.
// ****************************************************************

namespace NUnit.Samples.Money 
{

        using System;
        using System.Text;

        /// <summary>A simple Money.</summary>
        class Money: IMoney 
        {

                private int fAmount;
                private String fCurrency;
        
                /// <summary>Constructs a money from the given amount and
                /// currency.</summary>
                public Money(int amount, String currency) 
                {
                        fAmount= amount;
                        fCurrency= currency;
                }

                /// <summary>Adds a money to this money. Forwards the request to
                /// the AddMoney helper.</summary>
                public IMoney Add(IMoney m) 
                {
                        return m.AddMoney(this);
                }

                public IMoney AddMoney(Money m) 
                {
                        if (m.Currency.Equals(Currency) )
                                return new Money(Amount+m.Amount, Currency);
                        return new MoneyBag(this, m);
                }

                public IMoney AddMoneyBag(MoneyBag s) 
                {
                        return s.AddMoney(this);
                }

                public int Amount 
                {
                        get { return fAmount; }
                }

                public String Currency 
                {
                        get { return fCurrency; }
                }

                public override bool Equals(Object anObject) 
                {
                        if (IsZero)
                                if (anObject is IMoney)
                                        return ((IMoney)anObject).IsZero;
                        if (anObject is Money) 
                        {
                                Money aMoney= (Money)anObject;
                                return aMoney.Currency.Equals(Currency)
                                        && Amount == aMoney.Amount;
                        }
                        return false;
                }

                public override int GetHashCode() 
                {
                        return fCurrency.GetHashCode()+fAmount;
                }

                public bool IsZero 
                {
                        get { return Amount == 0; }
                }

                public IMoney Multiply(int factor) 
                {
                        return new Money(Amount*factor, Currency);
                }

                public IMoney Negate() 
                {
                        return new Money(-Amount, Currency);
                }

                public IMoney Subtract(IMoney m) 
                {
                        return Add(m.Negate());
                }

                public override String ToString() 
                {
                        StringBuilder buffer = new StringBuilder();
                        buffer.Append("["+Amount+" "+Currency+"]");
                        return buffer.ToString();
                }
        }
}