C#9 version of deno syntax episode downloader

DownloadShows.cs

using System; using System.Net; using System.IO;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Linq;
using Refit;

const string showList = "https://syntax.fm/api";

static async Task<List<Show>> getShowList() {
    var syntaxApi = RestService.For<ISyntaxApi>(showList);
    return await syntaxApi.GetShows();
}

static string generateShowName(Show show) {
    string cleansedTitle = Path.GetInvalidFileNameChars().Aggregate(show.title, (f, c) => f.Replace(c, '_'));
    return $"{ show.number } - { cleansedTitle } - { show.displayDate}.mp3";
}

static async Task downloadShow(WebClient client, Show show) {
    await client.DownloadFileTaskAsync(new Uri(show.url), Path.Combine(".", "shows", generateShowName(show)));
}

static async Task go() {
    var showList = await getShowList();
    var client = new WebClient();
    foreach (var show in showList) {
        Console.WriteLine($"Downloading show {generateShowName(show)}");
        await downloadShow(client, show);
    }
    Console.WriteLine("Done!");
}

await go();

record Show (
  int number,
  string title,
  long date,
  string url,
  string slug,
  string html,
  string notesFile,
  string displayDate,
  string displayNumber
);

interface ISyntaxApi
{
    [Get("/shows")]
    Task<List<Show>> GetShows();
}

This is a C#9 version of @wesbos's deno syntax episode downloader, just for a fun comparison :)