读写独立存储库

//独立存储库（Isolated Storage）,它是硬盘的一个分区，如果你在硬盘上执行搜索并包含隐藏文件，你找不到
        //在此库中创建的文件.
        private static void RWStorage()
        {
            IsolatedStorageFile isoStore;
            isoStore=IsolatedStorageFile.GetStore(IsolatedStorageScope.Assembly | IsolatedStorageScope.User ,null ,null); //|| IsolatedStorageScope.User
            string[] FileNames=isoStore.GetFileNames("mySecretStuff.secret") ;
            DateTime installDate=DateTime.Now ;
            if(FileNames.Length ==0)
            {
                //创建一个新的 存储文件
                StreamWriter writer =new StreamWriter(new IsolatedStorageFileStream("mySecretStuff.secret" ,FileMode.CreateNew ,isoStore)); 
                writer.WriteLine(DateTime.Now ) ;
                writer.WriteLine("mrfu");
                writer.Close(); 
            }
            else
            {
                StreamReader reader=new StreamReader( new IsolatedStorageFileStream("mySecretStuff.secret" ,FileMode.Open  ,isoStore)); 
                string tempStr=reader.ReadLine();
                string myName=reader.ReadLine();
                installDate=DateTime.Parse(tempStr); 
                MessageBox.Show(tempStr+"\n"+myName) ;

            }
            DateTime dateExpires=installDate.AddDays(60) ;
            
          
            System.TimeSpan diff1 ;
            diff1 = dateExpires.Subtract(DateTime.Now );
            
            MessageBox.Show(dateExpires.ToShortDateString()+"\n"+diff1.Days.ToString()  ) ;
             
            
        }