Uploading file or creating directory on ftp with unicode characters in name via C#

Hi all!

I need to create file or directory on ftp via C#. I tried to upload the file this way:

 public void upload(string remoteFile, string file_content)
 {
     try
     {
         string address = host + @"/текст.txt";
         Debug.Log(address); // gives a normal address in Unicode
         ftpRequest = (FtpWebRequest)FtpWebRequest.Create(address);
         ftpRequest.Credentials = new NetworkCredential(user, pass);
         ftpRequest.UseBinary = true;
         ftpRequest.UsePassive = true;
         ftpRequest.KeepAlive = true;
         ftpRequest.ContentLength = file_content.Length;
         ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
         byte[] byteBuffer = System.Text.Encoding.Unicode.GetBytes(file_content);
         try
         {
             using (ftpStream = ftpRequest.GetRequestStream())
             {
                 ftpStream.Write(byteBuffer, 0, byteBuffer.Length);
                 Debug.Log(Convert.ToString(byteBuffer));
             }
         }
         catch (Exception ex) 
         { 
             ErrorScene.error = "Local Error: 1. " + ex.ToString(); SceneManager.LoadScene("ErrorScene", LoadSceneMode.Single); 
         }
         ftpStream.Close();
         ftpRequest = null;
     }
     catch (Exception ex) 
     { 
         ErrorScene.error = "Local Error: 2. " + ex.ToString(); SceneManager.LoadScene("ErrorScene", LoadSceneMode.Single); 
     }
     return;
 }

And after this function call in ftp creates a file named ?????.txt.

Similarly with directories.

Is there a way to do this?

Thanks in advance.