What is the difference between override, new, and virtual keywords?

Question

Ponu Maurya · Answer

In C#, the virtual, override, and new keywords are used for method overriding and hiding in object-oriented inheritance. Here's a breakdown of each:
virtual
Used in a base class to indicate that a method or property 
can be overridden in a derived class.Allows runtime polymorphism.
public class Base
{
    public virtual void Show()
    {
        Console.WriteLine("Base Show");
    }
}
override
Used in a derived class to override a virtual method or property from a base class.The base class must mark the member as virtual, abstract, or
override.
public class Derived : Base
{
    public override void Show()
    {
        Console.WriteLine("Derived Show");
    }
}
and new
Used to hide a base class member without overriding it.Does not support polymorphism — the method called depends on the
reference type, not the object type.
public class Derived : Base
{
    public new void Show()
    {
        Console.WriteLine("Derived Show (new)");
    }
}
Example to Illustrate the Difference
Base obj = new Derived();
obj.Show(); // What gets called?
Output:
If Show() is overridden using override, output: 
"Derived Show"If Show() is hidden using new, output: "Base Show" (because
obj is a Base reference)
Summary Table
Keyword
Where Used
Purpose
Supports Polymorphism?
virtual
Base class
Marks a method as overridable
Yes
override
Derived class
Overrides a virtual/abstract method
Yes
new
Derived class
Hides base class method (not override)
No
and

forum

What is the difference between override, new, and virtual keywords?

Anubhav Kumar

Can you answer this question?

1 Answers

`virtual`

`override`

`new`

Example to Illustrate the Difference

Output:

Summary Table

Liked By

Keyword	Where Used	Purpose	Supports Polymorphism?
`virtual`	Base class	Marks a method as overridable	Yes
`override`	Derived class	Overrides a virtual/abstract method	Yes
`new`	Derived class	Hides base class method (not override)	No