CALF-CallingBaseMethod.cs

public abstract class Driver
{
  protected Driver() { }

  public abstract void Drive();

  public virtual void Stop() { }
}

public sealed class GolferDriver
  : Driver
{
  public override void Drive()
  {
    var value = RandomNumberGenerator.GetInt32(100, 150);
    Console.WriteLine($"Club head speed: {value} MPH");
  }

  public override void Stop()
  {
    base.Stop();

    var value = RandomNumberGenerator.GetInt32(250, 320);
    Console.WriteLine($"{value} yards");
  }
}