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Private and final methods in C#
Private Methods
To set private methods, use the private access specifier.
Private access specifier allows a class to hide its member variables and member functions from other functions and objects. Only functions of the same class can access its private members. Even an instance of a class cannot access its private members.
Final Methods
For final methods, use the sealed modifier.
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("ClassTwo: DerivedClass");
}
}
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.
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