C# byte类型和byte数组的使用

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private void button1_Click(object sender, EventArgs e)
        {
            byte b1 = 255;
            textBox1.Text = b1.ToString() + Environment.NewLine;

            byte b2 = 100;
            int i1 = b2;
            textBox1.Text += i1.ToString() + Environment.NewLine;

            byte[] b3 = new byte[] { 245, 170, 51 };
            textBox1.Text += b3[0].ToString() + Environment.NewLine;
            textBox1.Text += b3[1].ToString() + Environment.NewLine;
            textBox1.Text += b3[2].ToString() + Environment.NewLine;

            textBox1.Text += Environment.NewLine;
            string filePath = "example.txt";
            byte[] bytes = File.ReadAllBytes(filePath);
            foreach (byte b in bytes)
            {
                //Console.Write(b + " "); // 输出文件的字节内容
                textBox1.Text += b.ToString() + " ";
            }

            string filePath2 = "output.bin";
            byte[] bytesToWrite = new byte[] { 255, 100, 50 };
            File.WriteAllBytes(filePath2, bytesToWrite);
            //Console.WriteLine("文件写入成功！");
            //MessageBox.Show("文件写入成功！");
        }

先是基本的使用；

然后读文件到byte数组，输出每个字节；输出的就是文本框第6行之后的几行；

写文件，写入字节数组，文件打开看是乱码；