using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace Stream類加深
{
    public delegate void A(FileStream fileStream);
    class Program
    {
        static void Main(string[] args)
        {
           String [email protected]
 
"C:\Users\***\Desktop\abc.txt";
           A a = B;
           DoSomething(path, a);//用這個函式可以省略大量程式碼
            /*用匿名委託也可以做
             DoSomething(path,delegate(FileStream fileStream)
             {
                 byte []datas={100,101,102,103,104,105,106,107,108};
                 fileStream.Write(datas, 0, datas.Length);
             });
             */
        }
        public static void DoSomething(string path,A a)//不要忘記static
        {
            FileStream fileStream = new FileStream(path, FileMode.OpenOrCreate,FileAccess.ReadWrite, FileShare.ReadWrite);
            try
            {
                a(fileStream);
            }
            catch(Exception e)
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                if (fileStream != null) fileStream.Close();
            }
        }
        public static void B(FileStream fileStream)//不要忘記static
        {
            byte []datas={100,101,102,103,104,105,106,107,108};
            fileStream.Write(datas, 0, datas.Length);
        }
    }
}