Sealed class in C Sahrp

• If we want to prevent a class to be inherited then we use the keyword sealed.
• When a class is providing full functionality then it can be declared as sealed class.
• The sealed modifier can be applied to classes, instance methods and properties.
• A sealed class cannot be inherited. A sealed method overrides a method in a base class, but itself cannot be overridden further in any derived class.
• When applied to a method or property, the sealed modifier must always be used with override.
• It is an error to use a sealed class as a base class or to use the abstract modifier with a sealed class.
• Structs are implicitly sealed; therefore, they cannot be inherited.
• Advantages of sealed class is it restrict the third party vendor for developing new software by inheriting from our logic.

• using System;
  
  namespace sealedClassDemo
  {
      sealed class MySealedClass
      {
          public int Add(int x,int y)
          {
              return x+y;
          }
      }//_MySealedClass
  
      class Program
      {
          static void Main(string[] args)
          {
              MySealedClass sCls = new MySealedClass();
              int total = sCls.Add(10, 20);
              Console.Write("Total is "+total);
              Console.ReadKey();
          }
      }
  }
  

  
  

QUESTION: Can you allow class to be inherited, but prevent the method from being over-ridden?
ANSWER: Yes, just leave the class public and make the method sealed.