OkFlurl 1.0.7

using Flurl.Http;
using OkFlurl;

var req = new FlurlRequest("http://www.abc.com");

var txt = await FlurlExt.GetStringAsync(req, new { id =1});

var txt = await FlurlExt.PostReturnStringAsync(req, new { id =1});

var txt = await FlurlExt.PostFormReturnStringAsync(req, new { id =1});

//download file
var req = new FlurlRequest("https://pics0.baidu.com/feed/f603918fa0ec08fa82fd8b393277786057fbdad2.jpeg?token=a4ad50eb633955c5da143b63f685e4c7");

var progress = new FlurlProgress(data =>
{
    Console.WriteLine($"{data.Total}");
    Console.WriteLine($"{data.Read}");
    Console.WriteLine($"{data.Percent}");
});

var fullPath = await FlurlExt.GetDownloadDiskAsync(req, null, @"C:\\A", null, progress);
Console.WriteLine(fullPath);

//Post Form
var req2 = new FlurlRequest("http://localhost:5212/test/Upload111");
var par = new { metadata = "123", name = "李四123abcjadj" };
var form = new FlurlForm();

//upload progress
form.UploadProgress = new FlurlProgress(data =>
{
    label1.Text = data.Percent.ToString();
    progressBar1.Value = Convert.ToInt32(data.Percent);
});

//download progress
form.DownloadProgress = new FlurlProgress(data =>
{
    label1.Text = data.Percent.ToString();
    progressBar2.Value = Convert.ToInt32(data.Percent);
});

form.AddFile("a", @"D:\WPS_Setup_14309.exe");

await FlurlExt.PostFormDownloadDiskAsync(req2, par, @"C:\\AA2", null, form);