C# Polymorphism: Implementation Methods

In C#, polymorphism can be achieved in the following ways:

1. Method overloading is when multiple methods with the same name but different parameter lists are defined in the same class to perform different functions. When calling a method, the appropriate method is selected based on the type or number of parameters passed in.
2. Method overriding: Implementing polymorphism using inheritance and virtual methods. The parent class defines virtual methods, which can be overridden by subclasses to achieve different functionalities. The method called at runtime is based on the actual type of the object.
3. Interface: define interface specifications, different classes can implement these interfaces and provide different implementations. Implement polymorphism through interfaces, allowing different objects to be operated in the same manner.
4. An abstract class defines abstract methods that must be implemented by subclasses. This allows for polymorphism, enabling different subclasses to provide different implementations.
5. Delegate: Using delegates can achieve dynamic method calls, calling different methods based on the delegate type passed in.

These are all common ways to implement polymorphism in C#, and you can choose the appropriate method based on specific needs.