如何在c#中将二进制和ASCII码写入到同一个txt文件中？

using System;
using System.IO;
using System.Text;

class Program
{
    static void Main()
    {
        string binaryData = "01010101"; // 二进制数据
        string asciiData = "Hello, World!"; // ASCII码数据

        byte[] asciiBytes = Encoding.ASCII.GetBytes(asciiData); // 将ASCII码转换为字节数组

        using (FileStream fileStream = new FileStream("output.txt", FileMode.Create))
        {
            using (StreamWriter writer = new StreamWriter(fileStream))
            {
                writer.Write(binaryData); // 写入二进制数据
                writer.Write(Encoding.ASCII.GetString(asciiBytes)); // 写入ASCII码数据
            }
        }
    }
}