最近要傳圖片給特定的USER試了一下後，在USER在LINE上面看，圖片解析度很差，下載後也是一樣

下面是我要傳的圖片格式 size是2.2mb

使用的TOOL是C#，請問這是line的限制還是說程式部份能怎麼調整呢？

   var file = ImagePath;//圖檔位置
   var upfilebytes = File.ReadAllBytes(file);
   Url = Url + string.Format("?message=\r\n{0}", Msg);//組訊息

   foreach (string to in lstToken)
   {
     try
     {
        HttpClientHandler handler = new HttpClientHandler();
        HttpClient Client = new HttpClient(handler);
        Client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", to);    //Token  
        MultipartFormDataContent content = new MultipartFormDataContent();
        ByteArrayContent baContent = new ByteArrayContent(upfilebytes);   
        content.Add(baContent, "imageFile", "tmp");
        var response = Client.PostAsync(Url, content).Result;

        handler.Dispose();
        Client.Dispose();
        baContent.Dispose();
        content.Dispose();
     }
     catch (Exception ex)
     {
       ErrMsg(ttbLog, string.Format("Send Token:{0} SendNotify_Image fail, ex:{1}", to, ex.Message));
     }
    }
  upfilebytes = null;