В боте не могу реализовать посыл картинок

public static string POSTtoServerMIME(string upload_url,string nameFile)
        {
            var data = new HttpRequest();
            RequestParams reqParams = new RequestParams();
            byte[] file_bytes = FileBin(nameFile);
            MultipartFormDataContent form = new MultipartFormDataContent();
            //form.Add(new ByteArrayContent(file_bytes, 0, file_bytes.Length), "profile_pic", "3px.jpg");
            form.Add(new ByteArrayContent(System.IO.File.ReadAllBytes(nameFile)), "profile_pic", "3px.jpg");
            reqParams["file1"] = form;
            string response = data.Post(upload_url, reqParams).ToString();
            return response;
        }
 
        static byte[] FileBin(string fullpath)
        {
            FileStream fs = new FileStream(fullpath, FileMode.Open, FileAccess.Read);
            byte[] data = new byte[fs.Length];
            fs.Read(data, 0,data.Length);
            fs.Close();
            return data;
        }

        
public static void UploadMultipart(byte[] file, string filename, string contentType, string url)
        {
            var webClient = new WebClient();
            string boundary = "------------------------" + DateTime.Now.Ticks.ToString("x");
            webClient.Headers.Add("Content-Type", "multipart/form-data; boundary=" + boundary);
            var fileData = webClient.Encoding.GetString(file);
            var package = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"file\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n{3}\r\n--{0}--\r\n", boundary, filename, contentType, fileData);
            var nfile = webClient.Encoding.GetBytes(package);
            byte[] resp = webClient.UploadData(url, "POST", nfile);
 
        }

            
        public static string UploadMultipart(byte[] file, string filename, string contentType, string url)
        {
            var webClient = new WebClient();
            string boundary = "------------------------" + DateTime.Now.Ticks.ToString("x");
            webClient.Headers.Add("Content-Type", "multipart/form-data; boundary=" + boundary);
            var fileData = webClient.Encoding.GetString(file);
            var package = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"file\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n{3}\r\n--{0}--\r\n", boundary, filename, contentType, fileData);
            //var nfile = webClient.Encoding.GetBytes(package);
            //byte[] resp = webClient.UploadData(url, "POST", nfile);
            string response = webClient.UploadString(url, "POST", package);
            return response;
        }