Class which cannot be inherited

ValueType which have publicly visible constructors but you cannot derive from them. Classes with sealed or static keyword, valuetypes cannot be used in almost all situations. Also you may look for similar questions on SW, like this.

A sealed class cannot be used as a base class. For this reason, it cannot also be an abstract class. Sealed classes prevent derivation. Because they can never be used as a base class, some run-time optimizations can make calling sealed class members slightly faster.

A NotInheritable class is a class from which another class cannot be derived. NotInheritable classes are primarily used to prevent unintended derivation. In this example, class B is in error because it attempts to derive from the NotInheritable class A.

A class can not be marked both MustInherit and NotInheritable. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. What type of classes cannot be inherited in. Ask Question. Asked 9 years, 8 months ago. Active 4 years, 10 months ago. Viewed 13k times. Also What are the possible ways to prevent a class from being derived? Rohit Vipin Mathews. Answer: 4 Child class cannot access private methods of a base class; hence, they cannot be overridden in child class.

Protected methods are visible to only immediate child class. In below Java code example, compiler will throw an error as in derived class method f2 is calling private method of base class i. If we make it protected or private, then it will work.

Related Articles. Table of Contents. Save Article. Improve Article. Like Article. WriteLine "class Geek1" ;. WriteLine "class Geek2" ;.

GeeksForGeeks g;. Area ;. AddTwoNumbers 4, 6 ,. MultiplyTwoNumbers 6, 4 ;. Output: Addition : 10 Multiplication WriteLine d.