How to create a subclass in C#?

Question

How do I create a subclass in C# for ASP.NET using Visual Studio 2010?

Answer 1

This page explains it well:

public class SavingsAccount : BankAccount
{
    public double interestRate;

    public SavingsAccount(string name, int number, int balance, double rate) : base(name, number)
    {
        accountBalance = balance;
        interestRate = rate;
    }

    public double monthlyInterest()
    {
        return interestRate * accountBalance;
    }
}

static void Main()
{
    SavingsAccount saveAccount = new SavingsAccount("Fred Wilson", 123456, 432, 0.02F);

    Console.WriteLine("Interest this Month = " + saveAccount.monthlyInterest());
}

If the monthlyInterest method already exists in the BankAccount class (and is declared abstract, virtual, or override) then the SavingsAccount method definition should include override, as explained here. Not using override to redefine such class methods will result in a CS0108 compiler warning, which can be suppressed by using new as confusingly stated here.