Sealed is a keyword used to restrict inheritance future of programing language. When you mark any class to be sealed then you cannot make it to be parent class of other child class. In java final keyword is used for this same purpose.
Example:
namespace CA_Sealed
{
// declare sealed class
public sealed class student()
{
public void std()
{
Console.WriteLine("This is sealed method");
}
}
// here you cannot inherit properties of student class
class Program
{
static void Main(string[] args)
{
student obj =new student();
obj.std();
}
}
}
Output :
This is sealed method
You cannot declare method to be directly sealed but Methods of only derived class can be made sealed with keyword sealed.
Example :
namespace CA_Sealed
{
// declare sealed class
public class student()
{
public virtual void std()
{
Console.WriteLine("This is base class method");
}
}
// here you cannot inherit properties of student class
class Program:student
{
public sealed override void std()
{
Console.WriteLine("This is derived class method");
}
}
}
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