如何将postmand进程转换成c#程序

Question

我已经成功测试了邮递员。 我想知道为什么我的 C# 总是出错。

这是我的程序

using (var httpClient = new HttpClient())
{
    using (var formData = new MultipartFormDataContent())
    {
        httpClient.DefaultRequestHeaders.Authorization = new 
            AuthenticationHeaderValue("Bearer", accessToken);

        byte[] fileBytes = File.ReadAllBytes(filePath);
        var fileContent = new ByteArrayContent(fileBytes);
        formData.Add(fileContent, "file", Path.GetFileName(filePath));
        formData.Add(new StringContent("db_backup_archive_file"), "key");

        HttpResponseMessage response = await httpClient.PostAsync(url, formData);
        if (response.IsSuccessStatusCode)
        {
            Console.WriteLine("File uploaded successfully.");
        }
        else
        {
            Console.WriteLine($"Failed to upload file. Status code: 
                   {response.StatusCode}");
        }
    }
}

我的程序总是收到 BadRequest

上传文件失败。状态代码：BadRequest