public Computer
 (
     IMotherboard motherboard,
     IRam ram,
     IGraphicsCard graphicsCard,
     IHardDiskDrive hdd,
     ICPU cpu
 )
 {
     this.motherboard  = motherboard;
     this.ram          = ram;
     this.graphicsCard = graphicsCard;
     this.hdd          = hdd;
     this.cpu          = cpu;
 }
 public ComputerBuilder HardDiskDrive(IHardDiskDrive hdd)
 {
     this.hdd = hdd;
     return(this);
 }