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Can you override a virtual method?
You cannot override a non-virtual or static method. The overridden base method must be virtual , abstract , or override . An override declaration cannot change the accessibility of the virtual method. Both the override method and the virtual method must have the same access level modifier.
How do you call virtual methods?
When the virtual methods are overridden in a derived class, that derived class uses an instance, then invokes a derived class overridden method. When the virtual method is not overridden in a derived class and uses that derived class instance, it invokes the base class’s virtual method.
How do you override a call method?
Invoking overridden method from sub-class : We can call parent class method in overriding method using super keyword. Overriding and constructor : We can not override constructor as parent and child class can never have constructor with same name(Constructor name must always be same as Class name).
What is virtual override?
The virtual keyword is used to modify a method, property, indexer, or event declared in the base class and allow it to be overridden in the derived class. The override keyword is used to extend or modify a virtual/abstract method, property, indexer, or event of base class into derived class.
Is it compulsory to override a virtual function?
Virtual functions cannot be static. It is not mandatory for the derived class to override (or re-define the virtual function), in that case, the base class version of the function is used. A class may have virtual destructor but it cannot have a virtual constructor.
What is the difference between virtual method and abstract method?
Virtual methods have an implementation and provide the derived classes with the option of overriding it. Abstract methods do not provide an implementation and force the derived classes to override the method. So, abstract methods have no actual code in them, and subclasses HAVE TO override the method.
How to force virtual method to be called from?
Or other times where you call base and the derived class didn’t need to because it overrides all the base values rather than some of them. Is there a way to make this more robust/strict so such forgetfulness does not occur.
Can You overriding methods but Force base class’s method to be called?
Overriding methods but force base class’s method to be called. help me with, or even suggesting a better/different way. I have no idea if this can even be done or not.
Can you force the derived method to call the base?
We can do something like this: I spent a good 15 minutes with a logic error because i simply forgot the base init call. But there is no keyword to “demand” or contractually force the derived method to call the base equivalent. So if you forget, you’re going to have a bad time in some cases where you need to call the base.
How to override an abstract method in a derived class?
The way to solve this riddle is as follows: Declare two methods! One of them is marked ‘abstract’; the other is marked ‘virtual’ and calls the first one somewhere in its body. This way, the derived class is forced to override the abstract method, but the (partial) implementation in the virtual method can be safely inherited.