Can the new keyword override a method in c
In C#, the new
keyword can be used to hide a method from a base class, but it cannot override a method in the same way that virtual methods can be overridden.
When you use the new
keyword to hide a method, you are essentially creating a new method with the same name and signature as the method in the base class, but with a different implementation. This is known as "method hiding" or "method shadowing".
Here's an example:
public class BaseClass
{
public virtual void MyMethod() { Console.WriteLine("BaseClass"); }
}
public class DerivedClass : BaseClass
{
public new void MyMethod() { Console.WriteLine("DerivedClass"); }
}
In this example, the DerivedClass
has a method MyMethod()
that hides the method with the same name in the BaseClass
. When you create an instance of DerivedClass
and call MyMethod()
, it will call the method in DerivedClass
, not the method in BaseClass
.
However, if you want to override a method in a base class, you need to use the virtual
keyword in the base class and the override
keyword in the derived class. Here's an example:
public class BaseClass
{
public virtual void MyMethod() { Console.WriteLine("BaseClass"); }
}
public class DerivedClass : BaseClass
{
public override void MyMethod() { Console.WriteLine("DerivedClass"); }
}
In this example, the DerivedClass
overrides the MyMethod()
method in the BaseClass
. When you create an instance of DerivedClass
and call MyMethod()
, it will call the method in DerivedClass
, not the method in BaseClass
.
So, to summarize:
new
keyword hides a method, but does not override it.virtual
andoverride
keywords allow you to override a method in a base class.