using System;

using System.Net;

public class Program

{

    public static void Main()

    {

try

            {

                string URI = "https://admin.asilasal.ir/api/Guestuploadimage";

                string myParameters = "file=" + @"C:\Users\Administrator\Desktop\1.jpg";

                using (WebClient wc = new WebClient())

                {

                    wc.Headers[HttpRequestHeader.ContentType] = "multipart/form-data; boundary=<calculated when request is sent>";

                    wc.Headers.Set("Content-Length", "<calculated when request is sent>");

                    wc.Headers.Set("HOST", "<calculated when request is sent>");

                    wc.Headers.Set("User-Agent", "<PostmanRuntime/7.28.4>");

                    wc.Headers.Set("User-Agent", "*/*");

                    wc.Headers.Set("Accept", "*/*");

                    wc.Headers.Set("Accept-Encoding", "gzip, deflate, br");

                    wc.Headers.Set("Connection", "keep-alive");

                    string HtmlResult = wc.UploadString(URI, myParameters);

                    //MessageBox.Show(HtmlResult);

                }

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.Message);

            }

    }

}