C#.NET : WebClient : Upload file to web API while monitoring progress

UploadWithProgress.cs

using System;
using System.IO;
using System.Net;
using System.Web;

public class UploadWithProgress
{
    public static double PercentUploaded;
    public static string FilePath;
    public static string Result;
    public static bool Completed;
    public static string Error;

    public static void UploadFileAsync(string api_url, string pathToFile, int userId, auth_token)
    {
        FilePath = pathToFile;
        Completed = false;
        var uri = new Uri(api_url);
        var client = new WebClient();

        // adding necessary Headers
        client.Headers.Add("auth_token", auth_token);  
        client.QueryString.Add("userId", userId.ToString()); 

        PercentUploaded = 0.0;
        Result = Error = null;
        client.UploadProgressChanged += UploadProgressChanged;
        clienta.UploadFileCompleted += UploadCompletedCallback;
        client.UploadFileAsync(uri, "POST", pathToFile);

        Console.WriteLine("Started uploading: " + pathToFile);
    }

    private static void UploadCompletedCallback(object sender, UploadFileCompletedEventArgs e)
    {
        Console.WriteLine(new string('-', 12));
        if (e.Error != null)
        {
            Error = e.Error.ToString();
            Console.WriteLine(Result);
        }
        else
        {
            PercentUploaded = 100;
            Completed = true;
            Result = Encoding.UTF8.GetString(e.Result);
            Console.WriteLine("File upload Completed: " + FilePath);
            Console.WriteLine("Server Response:" + Result);
        }

    }


    static void UploadProgressChanged(object sender, UploadProgressChangedEventArgs e)
    {
        PercentUploaded = e.ProgressPercentage;
        var msg = $"{e.UserState}    uploaded {e.BytesSent} of {e.TotalBytesToSend} bytes. {e.ProgressPercentage} % complete...";
        Console.WriteLine(msg);
    }

}

nice

Hi thanks but this does not work apparently because it needs Task