string path = @"C:\Users\Administrator\Desktop\1.txt";

                using (FileStream ws = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))

                {

                    using (BinaryWriter bw = new BinaryWriter(ws))

                    {

                        bw.Write();

                        bw.Write(true);

                        bw.Write("hello world");

                    }

                }

                using (FileStream rs = new FileStream(path, FileMode.Open, FileAccess.Read))

                {

                    using (BinaryReader br = new BinaryReader(rs))

                    {

                        //读取的顺序必须和写入的顺序一致

                        int i = br.ReadInt32();

                        bool b = br.ReadBoolean();

                        string s = br.ReadString();

                        Console.WriteLine(i);

                        Console.WriteLine(b);

                        Console.WriteLine(s);

                    }

                }