.NET (Core and Framework)

public async Task<IActionResult> Login(LoginModel model)
            {
                var result = _authenticationService.ValidateUser("min.fr", model.UserName, model.Password);
                if (result)
                {
                    var claims = new List<Claim>
            {
                new Claim(ClaimTypes.Name, model.UserName),
                new Claim(ClaimTypes.Role, "Administrator")
            };

                    var claimsIdentity = new ClaimsIdentity(
                        claims, CookieAuthenticationDefaults.AuthenticationScheme);

   
                    await HttpContext.SignInAsync(
                            CookieAuthenticationDefaults.AuthenticationScheme,
                            new ClaimsPrincipal(claimsIdentity),
                            authProperties);
                }

            return RedirectToAction(nameof(MDashboardController.Index), "MDashboard");
 }

NetworkCredential myCred = new NetworkCredential("xxxxx@xx.xxx.xxx", "xxxxxxxx");
          using (var handler = new HttpClientHandler { Credentials = myCred })
          {
              HttpClient client = new HttpClient(handler);
              client.BaseAddress = new Uri("https://xxxxx.xxx.xx:2601/api/getallprices");
              HttpWebRequest request = (HttpWebRequest)WebRequest.Create(client.BaseAddress);
              HttpWebResponse WebResp = (HttpWebResponse)request.GetResponse();
          }

"Unable to connect to remote server"...

<system.net>
  <mailSettings>
    <smtp from="me@mydomain.com" deliveryMethod="Network">
      <network host="mail.mydomain.com" userName="me@mydomain.com" password="notneeded" defaultCredentials="false" />
    </smtp>
  </mailSettings>
</system.net><pre lang="HTML">

SmtpClient smtp = new SmtpClient();
smtp.Send("sender@mydomain.com", "recipient@somedomain.com" "subject", "message");

Hi can anyone help? I've been stuck with this issue for the past 2 days. I'm trying to run asp.net application in visual studio 2019 I've tried changing the port numbers, it doesn't work, it still pops up with the error "unable to connect to web server IIS Express'. I've deleted my vs folder with the config like 100 times, restarted visual studio, did a clean and build, restarted my PC. None of this has worked. I've looked into the list of processes and I can see this port is not being used. I've tried using netstat to find what's using that port no luck. I mean it doesn't make any sense, any ports I tried I get the same "unable to connect to web server iis express error. This is happening to multiple projects in a solution but when I create a new project in a fresh solution, I can run new projects fine. I've also tried visual studio 2017, no luck! So the problem is with these web projects. Someone please help I'm a bit frustrated.