==<box>==========

程式1 	被測試的Account類別
public class Account											//帳戶類別
{
    private float balance;							//存放帳戶餘額的變數
    public void Deposit(float amount)								//存款功能
    {
        balance+=amount;								//將存款加到餘額中
    }
    public void Withdraw(float amount)							//提款功能
    {
        if (balance-amount>=0)
		{
			balance-=amount;						//從餘額扣除提款金額
		}
		else
		{
			throw new BalanceException("帳戶餘額不足!");
		}
    }
　　public void Transfer(Account dest, float amount)
	{
		//需要加入異動控制
		Withdraw(amount);
		dest.Deposit(amount);
	}
    public float Balance								//帳戶餘額屬性
    {
        get{ return balance;}
    }
}

public class BalanceException : ApplicationException		//帳戶餘額不足的例外
{
	public BalanceException(string strDesc) : base(strDesc)
	{
	}
}
===<end>=====
==<box>==========

程式1 	被測試的Account類別
public class Account											//帳戶類別
{
    private float balance;							//存放帳戶餘額的變數
    public void Deposit(float amount)								//存款功能
    {
        balance+=amount;								//將存款加到餘額中
    }
    public void Withdraw(float amount)							//提款功能
    {
        if (balance-amount>=0)
		{
			balance-=amount;						//從餘額扣除提款金額
		}
		else
		{
			throw new BalanceException("帳戶餘額不足!");
		}
    }
　　public void Transfer(Account dest, float amount)
	{
		//需要加入異動控制
		Withdraw(amount);
		dest.Deposit(amount);
	}
    public float Balance								//帳戶餘額屬性
    {
        get{ return balance;}
    }
}

public class BalanceException : ApplicationException		//帳戶餘額不足的例外
{
	public BalanceException(string strDesc) : base(strDesc)
	{
	}
}
===<end>=====