Abstract vs Sealed Classes vs Class Members in C#

The abstract class includes abstract and non-abstract methods. You cannot instantiate an abstract class.

The sealed class prevents inheritance and you cannot use it as a base class.

Abstract Classes

To declare an abstract class, you need to place the keyword abstract before the class definition. An example of class members in an abstract class can be the following that defines an abstract method −

public abstract class Vehicle {
   public abstract void display();
}

The abstract method definition is followed by a semi-colon since it has no implementation.

Sealed Classes

To declare a sealed class, you need to place the keyword sealed before the class definition. The sealed class prevents inheritance and you cannot use it as a base class.

public sealed class Test {
   // Class members comes here
}

Karthikeya Boyini

Published on 24-Jul-2018 08:16:34

• Related Questions & Answers
• Virtual vs Sealed vs New vs Abstract in C#
• Classes vs Structures in C#
• C/C++ Struct vs Class
• Structure vs class in C++
• Debug Class vs Debugger Class in C#
• Abstract Classes in C#
• C++ vs C++0x vs C++11 vs C++98
• C++ vs Java vs Python?
• Explain Inheritance vs Instantiation for Python classes.
• enum vs. const vs. #define in C/C++
• Tokens vs Identifiers vs Keywords in C++
• Const vs Static vs Readonly in C#
• Push vs pop in stack class in C#
• What are abstract classes in C#?
• C++ vs C#