C# Program to Check a Specified Class is a Sealed Class or not

Last Updated : 09 Dec, 2021

A Sealed class is a class that will not let the users inherit the class. We can create a sealed class using sealed keywords. This keyword tells the compiler that the class is a sealed class. In this article, we will learn how to check the specified class is a sealed class or not. So we use the IsSealed property of the Type class. This property is used to check whether the given Type is sealed or not.

Syntax:

public bool IsSealed { get; }

Return: The return type of this property is boolean. It will return true if the given Type or class is sealed, otherwise, it will return false.

Example 1:

C#

// C# program to check if the given  
// class is sealed or not 
using System; 
using System.Reflection; 
  
// Declare a class without sealed 
public class Myclass1 
{ 
    public void display() 
    { 
        Console.WriteLine("Hello! GeeksforGeeks"); 
    } 
} 
  
// Declare a class with sealed 
sealed class Myclass2  
{ 
    public void Show() 
    { 
        Console.WriteLine("Hey! GeeksforGeeks"); 
    } 
} 
  
// Driver code 
class GFG{ 
  
public static void Main(string[] args) 
{ 
      
    // Check the given class is sealed or not 
    // Using IsSealed property 
    Console.WriteLine(typeof(Myclass1).IsSealed); 
    Console.WriteLine(typeof(Myclass2).IsSealed); 
} 
}

Output:

False
True

Example 2:

C#

// C# program to check if the given  
// class is sealed or not 
using System; 
using System.Reflection; 
  
// Declare a class with sealed keyword 
sealed class Myclass  
{ 
    public void Show() 
    { 
        Console.WriteLine("Hey! GeeksforGeeks"); 
    } 
} 
  
// Driver code 
class GFG{ 
  
public static void Main(string[] args) 
{ 
      
    // Check the given class is sealed or not 
    // Using IsSealed property 
    if (typeof(Myclass).IsSealed == true) 
    { 
        Console.WriteLine("The given class is a sealed class"); 
    } 
    else
    { 
        Console.WriteLine("The given class is not a sealed class"); 
    } 
} 
}