C# -安全的Base64作为Gif，当webRequest发送？

using System;
using System.IO;
using System.Net;

class Program
{
    static void Main()
    {
        // 读取Gif文件为字节数组
        byte[] gifBytes = File.ReadAllBytes("path/to/gif/file.gif");

        // 将字节数组进行Base64编码
        string base64String = Convert.ToBase64String(gifBytes);

        // 构建WebRequest对象
        WebRequest request = WebRequest.Create("http://example.com/api");
        request.Method = "POST";

        // 设置请求头
        request.ContentType = "application/x-www-form-urlencoded";

        // 构建请求体数据
        string postData = $"gif={base64String}";
        byte[] postDataBytes = System.Text.Encoding.UTF8.GetBytes(postData);

        // 设置请求体长度
        request.ContentLength = postDataBytes.Length;

        // 发送请求
        using (Stream requestStream = request.GetRequestStream())
        {
            requestStream.Write(postDataBytes, 0, postDataBytes.Length);
        }

        // 获取响应
        using (WebResponse response = request.GetResponse())
        {
            // 处理响应
        }
    }
}