How to send an object using BackgroundUploader?

Question

Hi All,

I am trying to upload an object contains one File and some string values (Object details are mentioned below) using backgrounduploader class. but I am unable to upload it using backgrounduploader. It is considering only File to upload  to the service.

Object details :
public class Pictures
    {
        public string PictureName { get; set; }
        public StorageFile file { get; set; }
        public string username{ get; set; }
        public string senderName { get; set; }
        public string receiverName { get; set; }

    }

BackgroundUploader uploader = new BackgroundUploader();

            uploader.SetRequestHeader("Filename", file.Name);
            uploader.Method = "POST";
            
           
            
            

            UploadOperation upload = uploader.CreateUpload(uri, file);

as shown in the above, I need to send an object instead of file.

Is there any other mechanism to perform this operation? Could anyone please help me to figure out this problem?

Thanks in advance.