[C#] 画像をダウンロードして保存する(HttpClient)

using System;
using System.Net.Http;
using System.IO;
using System.Threading.Tasks;

namespace DownloadImage_Test;
class Program
{
    static void Main(string[] args)
    {
        //ダウンロードする画像のURL
        var imgUrl = "https://yaspage.com/wp-content/uploads/2022/05/edge_version002-min-768x260.jpg";
        //保存するファイルパス
        var dlPath = @"C:\download_image.jpg";

        //画像をダウンロードして保存
        DownloadImgAsync(imgUrl, dlPath).Wait();
    }

    static async Task DownloadImgAsync(string imgUrl, string downloadPath)
    {
        //画像をダウンロード
        var client = new HttpClient();
        var response = await client.GetAsync(imgUrl);
        //ステータスコードで成功したかチェック
        if (response.StatusCode != System.Net.HttpStatusCode.OK) return;

        //画像を保存
        using var stream = await response.Content.ReadAsStreamAsync();
        using var outStream = File.Create(downloadPath);
        stream.CopyTo(outStream);
    }
}

using System.Threading.Tasks;
using System.Windows;
using System.Net.Http;
using System.IO;

namespace WpfApp1
{
    public partial class MainWindow : Window
    {
        public MainWindow() => InitializeComponent();

        //ボタンがクリックされた時に呼ばれるメソッド
        private async void button_Click(object sender, RoutedEventArgs e)
        {
            var imgUrl = "https://yaspage.com/wp-content/uploads/2022/05/edge_version002-min-768x260.jpg";
            var dlPath = "download_image.jpg";
            await DownloadImgAsync(imgUrl, dlPath);
        }

        private async Task DownloadImgAsync(string imgUrl, string downloadPath)
        {
            //画像をダウンロード
            var client = new HttpClient();
            var response = await client.GetAsync(imgUrl);
            if (response.StatusCode != System.Net.HttpStatusCode.OK) return;

            //画像を保存
            using var stream = await response.Content.ReadAsStreamAsync();
            using var outStream = File.Create(downloadPath);
            stream.CopyTo(outStream);
        }
    }
}