Solution Review: Implement the Derived Class

// Base Class
class Product {
  // Private Data Members
  private string name;
  private double price;
  // Getter method for name
  public string GetName(int liters) {
      if (liters == 1) {
          this.name = "Cola";
          return this.name;
      }
      else if (liters == 2) {
          this.name = "Fanta";
          return this.name;
      }
      else if (liters == 3) {
          this.name = "Dew";
          return this.name;
      }
      else return "";
  }
  // Getter method for price
  public double GetPrice(int liters) {
      if (liters == 1) {
          this.price = 2;
          return this.price;
      }
      
      else if (liters == 2) {
          this.price = 3.5;
          return this.price;
      }
  
      else if (liters == 3) {
          this.price = 4;
          return this.price;
      }
      else return 0;
  }
}
// Derived Class
class Beverage : Product { 
    public int Liters { get; set; } //  Liters of a Beverage
    public string GetDetails() {
        string details = GetName(this.Liters) + ", " + GetPrice(this.Liters) + ", " + Liters;
        return details;
    }
}
 
class Demo {
    public static void Main(string[] args) {
        Beverage berverage = new Beverage();
        berverage.Liters = 2;
        Console.WriteLine(berverage.GetDetails());
    }
}