How do I create a subclass in C# for ASP.NET using Visual Studio 2010?
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4 Answers
39
Do you mean this?
public class Foo
{}
public class Bar : Foo
{}
In this case, Bar is the sub class.

Herman Cordes
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31
Here is an example of writing a ParentClass and then creating a ChildClass as a sub class.
using System;
public class ParentClass
{
public ParentClass()
{
Console.WriteLine("Parent Constructor.");
}
public void print()
{
Console.WriteLine("I'm a Parent Class.");
}
}
public class ChildClass : ParentClass
{
public ChildClass()
{
Console.WriteLine("Child Constructor.");
}
public static void Main()
{
ChildClass child = new ChildClass();
child.print();
}
}
Output:
Parent Constructor. Child Constructor. I'm a Parent Class.
Rather than rewriting yet another example of .Net inheritance I have copied a decent example from the C Sharp Station website.

DDuffy
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Brian Scott
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6
Do you mean class inheritance?
public class SubClass: MasterClass
{
}

Pavel Morshenyuk
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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.

Cees Timmerman
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