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C# sealed class

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PrashantUnity answered on June 22, 2022 Popularity 10/10 Helpfulness 1/10

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C# sealed class

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The sealed keyword is used to prevent unintended derivation from a class. 
A sealed class cannot be an abstract class.

Popularity 10/10 Helpfulness 1/10 Language csharp

Source: zetcode.com

Tags: c# sealed-class

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Contributed on Nov 27 2022

PrashantUnity

0 Answers Avg Quality 2/10

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sealed class

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A sealed class, in C#, is a class that cannot be inherited by any class but 
can be instantiated. The design intent of a sealed class is to indicate that 
the class is specialized and there is no need to extend it to provide any 
additional functionality through inheritance to override its behavior.

Example: 
	namespace Account;
    sealed class BankAccount {...}

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Source: www.techopedia.com

Tags: sealed-class sealed-cla

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Contributed on Jun 22 2022

Wide-eyed Wolf

0 Answers Avg Quality 2/10

sealed method in c#

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Prevent overriding a method of a class. This is a method that is declared with
the keyword sealed and is always used with combination of override keyword. 
Derived classes will not be able to override this method as it is sealed for
overriding.
  
Example by me: 

    class Account
    {
        public int Number { get; set; }
        public string Holder { get; set; }
        public double Balance { get; protected set; } // protected property is used to avoid the access to the balance from outside the class

        public Account()
        {

        }

        public Account (int Number, string Holder, double Balance)
        {
            this.Number = Number;
            this.Holder = Holder;
            this.Balance = Balance;
        }

        public virtual void Withdraw(double amount)
        {
            if (amount > Balance)
            {
                Console.WriteLine("The amount exceeds the balance");
            }
            else
            {
                Balance -= amount;
            }
        }

    }

	namespace TestConsoleApp.Entities.AccountProject;
    sealed class SavingsAcount : Account
    {
        public double InterestRate { get; set; }

        public SavingsAcount()
        {

        }

        public SavingsAcount(int Number, string Holder, double Balance, double InterestRate) : base(Number, Holder, Balance)
        {
            this.InterestRate = InterestRate;
        }

        public void UpdateBalance()
        {
            Balance += Balance * InterestRate;
        }

        public override void Withdraw(double amount)
        {
            base.Withdraw(amount);
            //UpdateBalance();
        }
    }

    sealed class SavingsAcount : Account
    {
        public double InterestRate { get; set; }

        public SavingsAcount()
        {

        }

        public SavingsAcount(int Number, string Holder, double Balance, double InterestRate) : base(Number, Holder, Balance)
        {
            this.InterestRate = InterestRate;
        }

        public void UpdateBalance()
        {
            Balance += Balance * InterestRate;
        }

        public sealed override void Withdraw(double amount)
        {
            base.Withdraw(amount);
            //UpdateBalance();
        }
    }

With this 2 examples, you could make a third example trying to use the 
method Widtdraw of SavingsAccount if you would pretend to derivate 
SavingAccount class but you couldn't do that.

Popularity 10/10 Helpfulness 3/10 Language csharp

Source: interviewhttps

Tags: c# c

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Contributed on Jun 22 2022

Wide-eyed Wolf

0 Answers Avg Quality 2/10

sealed classes and members c#

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/* 
If applied to a class, prevents derivation from that class.
If applied to a method, prevents overriding of that method in a derived class.
The string class is declared as sealed, and that’s why we cannot inherit from it  
*/
public sealed class String
{ 
}

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Source: www.programiz.com

Tags: c# c

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Contributed on Aug 28 2022

Rasel Ahmed

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sealed class

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if (vehicle instanceof Car car) {
    return car.getNumberOfSeats();
} else if (vehicle instanceof Truck truck) {
    return truck.getLoadCapacity();
} else {
    throw new RuntimeException("Unknown instance of Vehicle");
}

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Source: www.baeldung.com

Tags: sealed-class sealed-cla

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Contributed on Aug 16 2022

Golu Rawat

0 Answers Avg Quality 2/10

sealed class

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public sealed interface Vehicle permits Car, Truck {

    String getRegistrationNumber();

}

public record Car(int numberOfSeats, String registrationNumber) implements Vehicle {

    @Override
    public String getRegistrationNumber() {
        return registrationNumber;
    }

    public int getNumberOfSeats() {
        return numberOfSeats;
    }

}

public record Truck(int loadCapacity, String registrationNumber) implements Vehicle {

    @Override
    public String getRegistrationNumber() {
        return registrationNumber;
    }

    public int getLoadCapacity() {
        return loadCapacity;
    }

}

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Source: www.baeldung.com

Tags: sealed-class sealed-cla

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Contributed on Aug 16 2022

Golu Rawat

0 Answers Avg Quality 2/10

C# sealed class

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