Hiding members with new

Context: Use the new modifier to hide an inherited member intentionally. This breaks polymorphism for that member.

Example

public class Base
{
    public void Display() => Console.WriteLine("Base");
}
public class Derived : Base
{
    public new void Display() => Console.WriteLine("Derived");
}

Polymorphic Behavior

With new, the method called depends on the compile‑time type.

Base b = new Derived();
b.Display(); // "Base" (not polymorphic)

Derived d = new Derived();
d.Display(); // "Derived"

When to Use

• When you cannot modify the base class (e.g., third‑party library).
• When you want to provide a new method with the same name but different behavior that should not be virtual.

Warning

Hiding can cause confusion; prefer override when possible.