title: Why restsharp don't get Parameter?
body: <p>I code C#. In my C# code add parameter &quot;aliasID&quot; and send request without &quot;aliasID&quot;.
  But when I use Postman, I add &quot;aliasID&quot; and it was sent.</p>
  <p>Code</p>
  <pre><code>namespace TrainEyeQTech.ViewModel
  {
      internal static class SetupAPI
      {
          public static void Register()
          {
              RestClient client = new RestClient(&quot;faceid/api/domain/register&quot;);
              //client.Timeout = -1;
              var request = new RestRequest(&quot;&quot;, Method.Post);
              request.AddHeader(&quot;Authorization&quot;, &quot;Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1lIjoiaW50ZXJuYWwtcmVnaXN0ZXIiLCJzZXJ2aWNlIjoiZmFjZWlkLXJlZ2lzdGVyIiwiZXh0cmEiOiJpbnRlcm5hbC1kZXYiLCJpYXQiOjE2MzUwODgzMjAsImV4cCI6MTY2NjYyNDMyMH0.8CBqXQNuCYXBjK7Nt4_fw1rZPIgK6WdZRbhIvWyaS1s&quot;);
              request.AddHeader(&quot;Content-Type&quot;, &quot;multipart/form-data; boundary=&lt;calculated when request is sent&gt;&quot;);
              request.AddHeader(&quot;Cookie&quot;, &quot;__cflb=02DiuDSnUsPgiMQzVNimjJdcPn2DXK4ZqAx6U3Qmmk1QQ&quot;);
              request.AddHeader(&quot;Content-Length&quot;, &quot;&lt;calculated when request is sent&gt;&quot;);
              request.AddHeader(&quot;Connection&quot;, &quot;keep-alive&quot;);
              //request.AddHeader(&quot;Host&quot;, &quot;&lt;calculated when request is sent&gt;&quot;); here will be error
              request.AddHeader(&quot;User-Agent&quot;, &quot;PostmanRuntime/7.29.2&quot;);
              
              request.AddHeader(&quot;Accept-Encoding&quot;, &quot;gzip, deflate, br&quot;);
              request.AddHeader(&quot;Postman-Token&quot;, &quot;&lt;calculated when request is sent&gt;&quot;);
              request.AddParameter(&quot;organization&quot;, &quot;internal-dev&quot;);
              request.AddFile(&quot;images[]&quot;, &quot;D:\\CLOUDX\\EyeQTech\\faceid\\itsme.jpg&quot;);
              request.AddParameter(&quot;aliasId&quot;, &quot;123_cuong&quot;); // here don't add aliasId prameter
              RestResponse response = client.Execute(request);
              Console.WriteLine(response.Content); //{messenge: missing aliasID}
  
          }
  }
  </code></pre>
  <p>Postman</p>
  <p><a href="https://i.stack.imgur.com/bxf0J.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>Here is headers of Postman</p>
  <p><a href="https://i.stack.imgur.com/OZGbI.png" rel="nofollow noreferrer">enter image description here</a></p>