static void Main(string[] args)
{
// Single Dispatch
Vehicle vehicle = new Vehicle();
Vehicle benz = new Benz();
Sales sales = new Sales();
Console.WriteLine("Single Dispatch Demo:");
Console.WriteLine($"Sales: The rate for common vehicle is: {sales.GetDiscountRate(vehicle)}");
Console.WriteLine($"Sales: The rate for benz is: {sales.GetDiscountRate(benz)}");
// Double Dispatch (fail)
SalesManager salesManager = new SalesManager();
Console.WriteLine("Double Dispatch Demo(失敗的例子):");
Console.WriteLine($"SalesManager: The rate for common vehicle is: {salesManager.GetDiscountRate(vehicle)}");
Console.WriteLine($"SalesManager: The rate for benz is: {salesManager.GetDiscountRate(benz)}");
// Double Dispatch (success)
SalesManager salesManager2 = new SalesManager();
Console.WriteLine("Double Dispatch Demo(成功的例子):");
Console.WriteLine($"SalesManager: The rate for common vehicle is: {salesManager2.GetDiscountRate((dynamic)vehicle)}");
Console.WriteLine($"SalesManager: The rate for benz is: {salesManager2.GetDiscountRate((dynamic)benz)}");
VisitorPattern.Visitor.Run(args);
}
public override double GetDiscountRate(Benz benz)
{
return(benz.GetBaseDiscountRate() * 1.1);
}
public virtual double GetDiscountRate(Benz benz)
{
return(benz.GetBaseDiscountRate());
}