What is the obvious problem below using System; abstract class A { abstract public int Rnd(); } class B : A { public int Rnd() { return new Random(1000).Next(); } static void Main() { } }

340.

What is the obvious problem below

using System;
abstract class A
{
  abstract public int Rnd();
}
class B : A
{
  public int Rnd()
  {
    return new Random(1000).Next();
  }

  static void Main()
  {

  }
}

Access modifier is missing from abstract class A. It should be Public abstract class A

You can't have an abstract method within an abstract class

The class B method Rnd is missing the keyword override. It should be public override int Rnd()

The method Rnd in the class A needs to be declared as a virtual class because its being overridden in the class B. It should be virtual public int Rnd();

View Description

If you inheriting from an abstract class then any abstract method that you are overriding needs to be declared as override