C#•3mo ago

help understanding something

do I always have to write all the methods in the abstract class first then override them in the classes that inherit from it? Or is there a way to leave the abstract class empty and only create the methods in the subclasses

6 Replies

canton7•3mo ago

Feel free to define methods in a subclass which aren't defined in the abstract class... But, then someone who just has a variable which has the type of the abstract class won't know that those methods exist

stanfx•3mo ago

oh I see now

canton7•3mo ago

public abstract class A
{
}

public class B : A
{
    public void Foo() { }
}

A a = new B();
a.Foo(); // Error, A doesn't have a method called Foo

public abstract class A
{
}

public class B : A
{
    public void Foo() { }
}

A a = new B();
a.Foo(); // Error, A doesn't have a method called Foo

stanfx•3mo ago

so when that error happens I need to define the method in the parent class

canton7•3mo ago

Well, you define a method in the parent class when you want people who have a variable whose type is the parent class to be able to access it

stanfx•3mo ago

I understand now, thank you for your help 🙏

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