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Convert PDF to ZPL using C#

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

class Program
{
    static void Main(string[] args)
    {
        string filePath = "test.pdf";

        try
        {
            string result = ConvertFileToZpl(filePath);
            Console.WriteLine("Response from server: " + result);
        }
        catch (Exception ex)
        {
            Console.WriteLine("An error occurred: " + ex.Message);
        }

        Console.Write("Press any key to exit...");
        Console.ReadKey();
    }

    public static string ConvertFileToZpl(string filePath)
    {
        // Read the file and convert it to Base64
        byte[] fileBytes = File.ReadAllBytes(filePath);
        string fileBase64 = Convert.ToBase64String(fileBytes);

        // Prepare the JSON data
        string json = $@"
        {{
            ""width"": 4,
            ""height"": 6,
            ""pdfBase64"": ""{fileBase64}""
        }}
        ";
        Console.WriteLine(json);

        // Prepare the HTTP request
        var request = (HttpWebRequest)WebRequest.Create("https://html-to-zpl.p.rapidapi.com/pdf2zpl");
        request.Method = "POST";
        request.Headers.Add("x-rapidapi-key", YOUR_API_KEY);
        request.ContentType = "application/json";
        using (var streamWriter = new StreamWriter(request.GetRequestStream()))
        {
            streamWriter.Write(json);
        }

        // Send the HTTP request and get the response
        var response = (HttpWebResponse)request.GetResponse();
        using (var streamReader = new StreamReader(response.GetResponseStream()))
        {
            // Read the response content
            string responseContent = streamReader.ReadToEnd();

            // Return the response content
            return responseContent;
        }
    }
}