Action Func

using System;
using static ActionFunc.BookDelegate;

namespace ActionFunc
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            {
                //自定义的委托
                Buybook buyBook = new Buybook(Book);
                buyBook();
                Buybook buybook = Book;// 简写
                // action 
                Action actionBuyBook = new Action(Book);
                actionBuyBook();
                Action actBuyBook = Book;// 简写
                actBuyBook();
                //actionAll
                Action<string> actionBuyAll = new Action<string>(Book);
                actionBuyAll("tiantian");
                Action<string> actBuyAll = Book;// 简写
                actBuyAll(" 简写tian");
                Console.Read();
            }
            //Action 无返回值
            //Func 有返回值
            {
                Func<string> funcBook = new Func<string>(FuncBook);
                var kkk = funcBook; ///kkk接到返回值
                Console.WriteLine(kkk);

                Func<string ,string> funcBook1 = new Func<string, string>(FuncBook);
                string aaa=funcBook1("书名");   //书名传进去
                Console.WriteLine(aaa+"返回的");
            }
        }



    }
}

using System;
using System.Collections.Generic;
using System.Text;
 
namespace ActionFunc
{
    class BookDelegate
    {
 
        public delegate void Buybook();
 
        public static void Book()
        {
            Console.WriteLine("我这有书");
 
        }
        public static void Book(string book)
        {
            Console.WriteLine("我这有书"+book);
 
        }
        public static void Book(int book) {
            Console.WriteLine( "int");
        }
        public static string  FuncBook()
        {
            var back = "start sell book";
            Console.WriteLine("start sell book");
            return back;
        }
        public static string FuncBook( string BookName)
        {
            
            var back = "start sell book"+ BookName;
            Console.WriteLine(back);
            return back;
        }
 
 
    }
}
    