Illustrates versioning: virtual/new : virtual « Class « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Class
3. virtual

using System;

public class BaseClass
{
  public string firstName;
  public string lastName;

  public BaseClass(string firstName, string lastName)
  {
    this.firstName = firstName;
    this.lastName = lastName;
  }

  public virtual void Accelerate()
  {
    Console.WriteLine("In BaseClass Accelerate() method");
    Console.WriteLine(lastName + " accelerating");
  }

}

public class DerivedClass : BaseClass
{

  public DerivedClass(string firstName, string lastName) : base(firstName, lastName)
  {
  }

  public new void Accelerate()
  {
    Console.WriteLine("In DerivedClass Accelerate() method");
    Console.WriteLine(lastName + " accelerating");
  }

}

class MainClass
{
  public static void Main()
  {
    Console.WriteLine("Creating a DerivedClass object");
    DerivedClass myDerivedClass = new DerivedClass("Toyota", "MR2");

    Console.WriteLine("Calling myDerivedClass.Accelerate()");
    myDerivedClass.Accelerate();
  }
}

Creating a DerivedClass object
Calling myDerivedClass.Accelerate()
In DerivedClass Accelerate() method
MR2 accelerating