IT SOLUTIONS
Your full service technology partner! 
-Collapse +Expand
C#
Search C# Group:

Advanced
-Collapse +Expand C# To/From
To/FromCODEGuides
-Collapse +Expand C# Study Test
PRESTWOODCERTIFIED
-Collapse +Expand C# Store
PRESTWOODSTORE

Prestwood eMagazine

February Edition
Subscribe now! It's Free!
Enter your email:

   ► KBProgrammingC#OOP   Print This     
  From the July 2009 Issue of Prestwood eMag
 
C# OOP:
C# Prevent Derivation (sealed)
 
Posted 17 years ago on 10/24/2008 and updated 1/19/2009
C# Code Snippet:
 A flashcard from our C# Flashcards Library
 A code snippet from our C# Code Snippets Page

KB101423

Languages Focus: Prevent Derivation

How do you prevent another class from inheriting and/or prevent a class from overriding a member.

C# Prevent Derivation

With C#, use the sealed keyword to prevent a class from being inherited from and to prevent a method from being overridden.

A method marked sealed must override an ancestor method. If you mark a class sealed, all members are implicitly not overridable so the sealed keyword on members is not legal.

Syntax Example:
public class Machine : System.Object
{
public virtual void Speak(String pSentence)
{
MessageBox.Show(pSentence);
}
}

public class Robot : Machine
{
public sealed override void Speak(String pSentence)
{
MessageBox.Show(pSentence);
}
}
  
public sealed class Cyborg : Robot
{
}

Comments

0 Comments.
Share a thought or comment...
 
Write a Comment...
...
Sign in...

If you are a member, Sign In. Or, you can Create a Free account now.


Anonymous Post (text-only, no HTML):

Enter your name and security key.

Your Name:
Security key = P1183A1
Enter key:
Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

Visit Profile

 KB Article #101423 Counter
8712
Since 10/24/2008
Go ahead!   Use Us! Call: 916-726-5675  Or visit our new sales site: 
www.prestwood.com


©1995-2025 Prestwood IT Solutions.   [Security & Privacy]