Hello, I have a class structure like

abstract class Animal {
  public Animal(){
    //init stuff..
  }
}

class Cat : Animal {
  public Cat(bool is_keyboard) : base() //NOTE here
  {
    //other init stuff
  }
}

Now then, look at the noted line. If you remove : base() then it will compile without an error.

Why is this? Is there a way to disable this behavior?

I have had multiple bugs now from forgetting the base() which I would have thought to be required on such a special thing as a constructor.