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What are sealed modifiers in C#?
When you use sealed modifiers in C# on a method, then the method loses its capabilities of overriding. The sealed method should be part of a derived class and the method must be an overridden method.
Let us see an example −
The following example won’t allow you to override the method display() because it has a sealed modifier for the ClassTwo derived class −
ClassOne is our base class, whereas ClassTwo and ClassThree are derived classes −
Example
class ClassOne {
public virtual void display() {
Console.WriteLine("baseclass");
}
}
class ClassTwo : ClassOne {
public sealed override void display() {
Console.WriteLine("ClassTwoderivedClass");
}
}
class ClassThree : ClassTwo {
public override void display() {
Console.WriteLine("ClassThree: Another Derived Class");
}
}Above, under ClassThree derived class we have tried to override the sealed method. This will show an error since it is not allowed when you use the sealed method.
Updated on: 21-Jun-2020
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