static void Main(string[] args)
{
var sb = new StringBuilder();
var modifyPrice = new ModifyPrice();
var product = new Product("Phone", 500);
sb.AppendLine(Execute(product, modifyPrice, new IncreasePriceCommand(product, 100)));
sb.AppendLine(Execute(product, modifyPrice, new IncreasePriceCommand(product, 50)));
sb.AppendLine(Execute(product, modifyPrice, new DecreasePriceCommand(product, 25)));
sb.AppendLine(Execute(product, modifyPrice, new MultiplyPriceCommand(product, 2)));
sb.AppendLine(Execute(product, modifyPrice, new DevidePriceCommand(product, 4)));
Console.WriteLine(sb.ToString().TrimEnd());
Console.WriteLine(product);
}
private static string Execute(Product product, ModifyPrice modifyPrice, ICommand productCommand)
{
modifyPrice.SetCommand(productCommand);
return(modifyPrice.Invoke());
}