How to stream a PDF directly to the end user with ASP.NET C# MVC

csharp-example1.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;

public class PdfController : Controller
{
    private static readonly HttpClient httpClient = new HttpClient();

    public async Task<IActionResult> Run()
    {
        string apiKey = "YOUR-API-KEY";
        string value = "http://www.google.com"; // URL or HTML string

        var formData = new Dictionary<string, string>
        {
            { "apikey", apiKey },
            { "value", value }
        };

        using (var content = new FormUrlEncodedContent(formData))
        {
            HttpResponseMessage response = await httpClient.PostAsync("https://api.html2pdfrocket.com/pdf", content);
            response.EnsureSuccessStatusCode();

            byte[] pdfBytes = await response.Content.ReadAsByteArrayAsync();
            MemoryStream ms = new MemoryStream(pdfBytes);

            return File(ms, "application/pdf", "myfilename.pdf");
        }
    }
}