//引入命名空间
using System;
using System.IO;

class ConsoleApplication
{
    const string fileName = "AppSettings.dat";

    static void Main()
    {
        WriteDefaultValues();
        DisplayValues();
    }

    public static void WriteDefaultValues()
    {
        using (BinaryWriter writer = new BinaryWriter(File.Open(fileName, FileMode.Create)))
        {
            writer.Write(1.250F);
            writer.Write(@"c:\Temp");
            writer.Write(10);
            writer.Write(true);
        }
    }

    public static void DisplayValues()
    {
        float aspectRatio;
        string tempDirectory;
        int autoSaveTime;
        bool showStatusBar;

        if (File.Exists(fileName))
        {
            using (BinaryReader reader = new BinaryReader(File.Open(fileName, FileMode.Open)))
            {
                aspectRatio = reader.ReadSingle();
                tempDirectory = reader.ReadString();
                autoSaveTime = reader.ReadInt32();
                showStatusBar = reader.ReadBoolean();
            }

            Console.WriteLine("Aspect ratio set to: " + aspectRatio);
            Console.WriteLine("Temp directory is: " + tempDirectory);
            Console.WriteLine("Auto save time set to: " + autoSaveTime);
            Console.WriteLine("Show status bar: " + showStatusBar);
        }
    }
}

//引入命名空间
using System;
using System.IO;

class MainClass {
    static void Main() {
        using (FileStream fs = new FileStream("test.bin", FileMode.Create)) {
            using (BinaryWriter w = new BinaryWriter(fs)) {
                w.Write(124.23M);
                w.Write("Tstring");
                w.Write("Tstring 2");
                w.Write('!');
            }
        }
        Console.WriteLine("Press Enter to read the information.");
        Console.ReadLine();

        using (FileStream fs = new FileStream("test.bin", FileMode.Open)) {
            using (StreamReader sr = new StreamReader(fs)) {
                Console.WriteLine(sr.ReadToEnd());
                Console.WriteLine();

                fs.Position = 0;
                using (BinaryReader br = new BinaryReader(fs)) {
                    Console.WriteLine(br.ReadDecimal());
                    Console.WriteLine(br.ReadString());
                    Console.WriteLine(br.ReadString());
                    Console.WriteLine(br.ReadChar());
                }
            }
        }
    }
}