C#

abstract public class MyClass2: MyClass1
{
    public override int f()
    {
        return 0;
    }

    public static void Main()
    {
    }
}

Deborah Palmer McCain wrote:

Should this be simple deduction and logical?

public abstract class Foo
{
    public abstract void Bar();
}

public abstract class Baz : Foo
{
    //Not-necessary to implement Bar() as Baz is also abstract
    public virtual void Quux()
    {
    }

    public virtual void Grault()
    {
    }
}

public class Corge : Foo
{
    public override void Bar()
    {
        //As this is non-abstract it must implement Bar()
    }

    public override void Quux()
    {
        //Overides virtual method
    }

    //Not-necessary to override Grault, but it is possible as per Quux().
}

public override int f()
{
...
}

abstract public class MyClass2

abstract public class MyClass2: MyClass1