Calling derived class method instead base class method c#

Question

I have this array in program

ClassA[] array=new ClassA[20];

array[0]=new ClassB();
array[1]=new ClassA();

This is the class file

public class ClassA
{
    public void method()
    {
        Console.WriteLine("1");
    }
}

public class ClassB : ClassA
{
    public void method()
    {
        Console.WriteLine("2");
    }
}

It writes 1, in both cases, but i want in first case to write 2, (to call method of ClassB).
How to do that?

Declare the base class method as `virtual`. Declare the derived class method as `override`. And please use conventional indentation in your code. The original formatting was difficult to read. — 15ee8f99-57ff-4f92-890c-b56153, Jun 01 '18 at 16:09
You need to read a c# tutorial... https://learn.microsoft.com/en-us/dotnet/csharp/tutorials/inheritance — Camilo Terevinto, Jun 01 '18 at 16:12

score 1 · Answer 1 · answered Jun 01 '18 at 16:13

You have to use override keyword in C# when you want to override method in child class.

public class ClassA
{
    public virtual void method()
    {
        Console.WriteLine("1");
    }
}

public class ClassB : ClassA
{
    public override void method()
    {
        Console.WriteLine("2");
    }
}

Regards.

Calling derived class method instead base class method c#

1 Answers1