Chapter 10. Design mode-Factory mode

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespaceconsoleapplication9{/*design mode: Factory mode*/    //Parent class: NoteBook     Public Abstract classNoteBook { Public Abstract voidSayHello (); }        //sub-class:     Public classAsus:notebook { Public Override voidSayHello () {Console.WriteLine ("I'm an ASUS notebook ."); }    }     Public classAcer:notebook { Public Override voidSayHello () {Console.WriteLine ("I'm a Acer laptop ."); }    }     Public classIbm:notebook { Public Override voidSayHello () {Console.WriteLine ("I am an IBM notebook"); }    }     Public classDell:notebook { Public Override voidSayHello () {Console.WriteLine ("I'm a Dell laptop ."); }    }        classProgram {Static voidMain (string[] args) {Console.WriteLine ("Please enter the notebook brand you want:"); stringBrand =Console.ReadLine (); NoteBook NB=Getnotebook (brand); nb.            SayHello ();              Console.ReadLine (); }        /// <summary>        ///the core of a simple factory (create objects assigned to the parent class based on user input)/// </summary>        /// <param name= "brand" >Brand</param>        /// <returns></returns>         Public StaticNoteBook Getnotebook (stringbrand) {NoteBook NB=NULL; Switch(brand) { Case "ASUS": NB =NewASUS ();  Break;  Case "IBM": NB =NewIBM ();  Break;  Case "DELL": NB =NewDELL ();  Break;  Case "Acer": NB =NewAcer ();  Break; }            returnNB; }    }}

Chapter 10. Design mode-Factory mode