Is there a way to convert byte into IFormFile c# .net 4.5

Question

I have a project implemented in .NET 4.5, and for some reason, I cannot change it. I want to post a photo to a web API that is implemented with .NET Core. The API endpoint uses HTTP POST, and its input type is generic ICollection that its type is IFormFile. However, I am unable to send even one picture because I can only send byte types to the API. How can I solve this problem? Here is my code:

 using (HttpClient client = new HttpClient())
            {
                client.BaseAddress = new Uri(ServiceInfo.VIPCParams["DMSUri"].Value);
                client.DefaultRequestHeaders.Accept.Clear();
               // client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", responseModelLogin.Token);

                // string json = JsonConvert.SerializeObject(parameters);
              // HttpContent content = new ByteArrayContent(uploadRequest.File);

               HttpContent content = new ByteArrayContent(uploadRequest.File);

                //HttpContent content = new StreamContent(stream);

                //content.Headers.ContentType = new MediaTypeHeaderValue("application/json");



                //using (var stream = new MemoryStream(uploadRequest.File))
                //{
                //    await documentRepository.UploadFile(stream);
                //}


               // content.Headers.ContentType = MediaTypeHeaderValue.Parse("multipart/form-data");
                var multipartContent = new MultipartFormDataContent();
                multipartContent.Add(content);

               // multipartContent.Add(new StreamContent(content));

                HttpResponseMessage res = client.PostAsync(url, multipartContent).Result;
                string data = res.Content.ReadAsStringAsync().Result;
                mSUploadResponse = JsonConvert.DeserializeObject<DMSUploadResponse>(data);
            }