Синтаксис:
abstract class имя {тело_класса};
Пример:
abstract class Animal { public string Name; protected int Weight; private int Type; abstract void Feed(); public int Animal(int W, int T, string N) { Weight=W; Type=T; Name=N; } public int GetWeight(){ return Weight; } } class Predator:Animal { private int Speed; override void Feed(int Food){ Weight += Food; } }