#region StringReader，StringWriter的使用；

//                string text = @"姓名：水田如雅；
//                                年龄：20；
//                                性别：女";
//                StringReader reader = new StringReader(text);
//                int c = reader.Read();
//                Console.WriteLine((char)c);

//                char[] buffer = new char[7];
//                reader.Read(buffer, 0, buffer.Length);
//                Console.WriteLine(string.Join("", buffer));

//                string line = reader.ReadLine();
//                Console.Write(line);

//                string rest = reader.ReadToEnd();
//                Console.WriteLine(rest);

//                reader.Dispose();
//                Console.ReadKey();

            #endregion

            #region streamreader/StreamWriter的使用

                //FileStream fs = new FileStream("AboutVac.txt", FileMode.Open, FileAccess.Read);
                //StreamReader reader=new StreamReader(fs,Encoding.GetEncoding("GB2312"));

                //do
                //{
                //    Console.WriteLine(reader.ReadLine());

                //} while (reader.Read()>0);

                //StreamWriter writer = new StreamWriter("aboutMe.txt", false, Encoding.UTF8);
                //writer.Write("hello,word");
              
                //reader.Dispose();
                //writer.Dispose();

                //Console.ReadKey();


            #endregion

            #region BinaryReader/BinaryWriter的使用

                //Product product = new Product("Product.txt") { 
            
                //        id=110,
                //        price=123.3,
                //        Name="lhc"
            
                //};
                //product.Save();
                //Product newItem =new  Product("Product.txt");
                //newItem.Load();
                //Console.WriteLine(newItem);
                //Console.ReadKey();
                


            #endregion

public class Product {

        public int id { get; set; }
        public string Name { get; set; }
        public double price { get; set; }

        private string filePath;
        public Product(string filePath) { this.filePath = filePath; }

        public void Save() {

            FileStream fs = new FileStream(this.filePath, FileMode.Create, FileAccess.Write);
            BinaryWriter writer = new BinaryWriter(fs);
            writer.Write(this.id);
            writer.Write(this.Name);
            writer.Write(this.price);
            writer.Dispose();
        }

        public void Load() {

            FileStream fs = new FileStream(this.filePath, FileMode.Open, FileAccess.Read);
            BinaryReader reader = new BinaryReader(fs);
            this.id = reader.ReadInt32();
            this.Name = reader.ReadString();
            this.price = reader.ReadDouble();
            reader.Dispose();
        
        }

        public override string ToString()
        {
            return string.Format("ID:{0},Name:{1},Price:{2}", this.id, this.Name, this.price);

        }
    }

  #region 工具类示例
               // File.WriteAllText("FileTest.txt", "hello,i'm using file ", Encoding.UTF8);
  #endregion