Suppose I write a class with a implementation of a dozen methods, but one of the methods must be implemented by a user of my class. In other words, I need to force the heir to implement a certain method, otherwise my class should not work.
How to implement this in C #?
I was told to use the interfaces, but with them "the stone flower does not come out."

  • "my class should not work" - the heir should not work? - Igor
  • @Igor My class is the base class, and the heir is not mine. - Grizlov
  • @Igor if you want to answer the question - write the answer. Answers-links in the comments - evil. - PashaPash ♦
  • abstract methods - so normal? - Igor
  • @Igor Answers-not links in the comments - also evil. write a detailed answer if you want to answer. do not limit yourself to a suggestive comment :) - PashaPash ♦

1 answer 1

Mark the class and method that is required to implement as abstract:

abstract class Base { // обязателен к реализации в не-абстрактных наследниках protected abstract void SomeMethod(); // не обязателен к переопределению в наследнике protected virtual void SomeNonAbstractMethod() { } } // не-абстрактный наследник class Child : Base { // если метод не реализован - компилятор выдаст ошибку protected override void SomeMethod() { } }
  • private override ? - interesting - Igor
  • @Igor studio reprinted :) corrected. - PashaPash ♦
  • the second method and should not implement the heir. Or it should also be virtual , then it can be implemented, but not necessarily - rdorn
  • I know about new , but this is in an extreme case, it seems like when it is impossible, but I really want to. - rdorn
  • @rdorn added virtual. but in general the idea was to show that there could be non-abstract methods in abstract classes - PashaPash ♦