C# File类中的文件读写方法详解

byte[] data = new byte[1024];
for (int i = 0; i < 1024; i++)
    data[i] = (byte)i;

​​​​​​​File.WriteAllBytes("test.bin", data);

data = File.ReadAllBytes("test.bin");
foreach (var d in data)
    Console.Write($"{d}, ");

File.WriteAllText("test.txt", "if u miss the train i'm on, ");
File.AppendAllText("test.txt", "u will know that i'm gone");
var s = File.ReadAllText("test.txt");
Console.WriteLine(s);

File.WriteAllText("test.txt", "桃李春风一杯酒");
File.AppendAllText("test.txt", "江湖夜雨十年灯", Encoding.Unicode);

var s = File.ReadAllText("test.txt");
Console.WriteLine(s);

string[] poem0 = new string[] { "我居北海君南海", "寄雁传书谢不能" };
string[] poem1 = new string[] { "桃李春风一杯酒", "江湖夜雨十年灯" };
File.WriteAllLines("lines.txt", poem0);
File.AppendAllLines("lines.txt", poem1);

var s = File.ReadAllLines("lines.txt");
foreach (var item in s)
    Console.WriteLine(item);