How can I extend and add to the IFormFile Interface in .NET Core. Need to append data to the serialised array when submitting an ajax request

I need to upload a file using .net core.

I am using a multipart form and AJAX.

However I have a unique requirement. I need to be able to add data to the serialized array and then bind it to the controller through an ajax POST request and Model Binding.

I need to add an id, which i pass to the controller. Based on the id I decide to which row in a table I save the uploaded file details.

My Controller to which I am Posting:

 [HttpPost]
        public async Task<IActionResult> File(List<IFormFile> files)
        {
            long size = files.Sum(f => f.Length);


            var filePath = Path.GetTempFileName();


            foreach (var formFile in files)
            {
                if (formFile.Length > 0)
                {
                    using (var stream = new FileStream(filePath, FileMode.Create))
                    {
                        await formFile.CopyToAsync(stream);
                    }
                }
            }

            string fpath = filePath;

            var query = from d in db.TableA
                        where d.File == null && d.id == id // This is where I need to compare the ID
                        select d;


            foreach (TableA details in query)
            {
                details.File = filePath;
            }
            try
            {
                await db.SaveChangesAsync(); // await needed to hold execution
            }
            catch (Exception e)
            {
                Console.WriteLine(e);

            }


            return RedirectToAction("View");
        }

where d.File == null && d.id == id // This is where I need to compare the ID

Multi Part Form:

<form method="post" id="typea" enctype="multipart/form-data" asp-controller="Main" asp-action="File">
<label class="btn btn-info"> Upload your document <input type="file" name="files" onchange="this.form.submit()" hidden />
</label>
</form>

My Ajax call:

 $(document).ready(function () {
        $('#typea').click(function () {


            event.preventDefault();


            var $form = $(this);
            var serializedData = $form.serializeArray();
            serializedData.push({ name: "ID", value: "typea" });
            $.ajax({
                url: "Main/File",
                type: "POST",
                data: serializedData

            });

        });

My problem is this:

If i push the array I cannot count on IFormFile Interface for model binding.

Can I somehow extend the IFormFIle interface?

Or is there a way I can do it without using the IFormFile. I tried to write my own model referencing from the IFormFIle interface but could not.

public interface IFormFile
{
    string ContentType { get; }
    string ContentDisposition { get; }
    IHeaderDictionary Headers { get; }
    long Length { get; }
    string Name { get; }
    string FileName { get; }
    Stream OpenReadStream();
    void CopyTo(Stream target);
    Task CopyToAsync(Stream target, CancellationToken cancellationToken = null);
}

I could not use the methods of the interface, which is obvious. Pointers please :).