/// <summary>
/// Adjust the interest rate
/// </summary>
/// <param name="bankaccount">an instance of bank account</param>
/// <returns></returns>
public virtual double RateAdjustment(BankAccount bankAccount)
{
return(0);
}
/// <summary>
/// Check if the account state has changed
/// </summary>
/// <param name="bankAccount">an instance of bank account</param>
public virtual void StateChangeCheck(BankAccount bankAccount)
{
}
/// <summary>
/// Adjust the interest rate
/// </summary>
/// <param name="bankAccount">An instance of bank account</param>
/// <returns></returns>
public override double RateAdjustment(BankAccount bankAccount)
{
double rate = this.Rate;
return(rate);
}