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I have read about virtual methods in C#. Is there any concept called virtual class in C#? Is abstract class in C# and virtual class in C++ the same?
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A class may have virtual destructor but it cannot have a virtual constructor.
To resolve this ambiguity when class A is inherited in both class B and class C, it is declared as virtual base class by placing a keyword virtual as : Syntax for Virtual Base Classes: Syntax 1: class B : virtual public A { }; Syntax 2: class C : public virtual A { };
Constructor can not be virtual, because when constructor of a class is executed there is no vtable in the memory, means no virtual pointer defined yet. Hence the constructor should always be non-virtual.
In object-oriented programming, a virtual base class is a nested inner class whose functions and member variables can be overridden and redefined by subclasses of an outer class. Virtual classes are analogous to virtual functions.
There is no such thing in C# - and it's really not necessary since multiple implementation inheritance is not supported. Making a class abstract really only means that you cannot create instances of that class and they might not be fully implemented (e.g. might contain abstract methods).
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There are no virtual classes in C#. Abstract class is not the same since you cannot instantiate an abstract class.
You can do the opposite of marking something virtual by marking it sealed, which prevents it from being inherited.
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