Question

I have such class in c#:

public class Foo 
{
    public static readonly int SIZE = 2;
    private int[] array;

    public Foo
    {
        array = new int[SIZE];
    }

}

and Bar class:

public class Bar : Foo
{
    public static readonly int SIZE = 4;

}

What I want to accopmlish is to create a Bar instance with array size taken from overrided SIZE value. How to do it properly?

Answer 1

You can’t do it this way. You could use a virtual method:

public class Foo 
{
    protected virtual int GetSize(){return 2;};
    private int[] array;

    public Foo
    {
        array = new int[GetSize()];
    }
}

It’s also possible to use reflection to look for a static field SIZE, but I don’t recommend that.