Como enviar un IFormFile desde Xamarin a un api

[HttpPost]
public async Task<IActionResult> Post([FromForm] IFormFile image)
{
    try
    {
        var file = image;
        if (file.Length > 0)
        {
            using (var ms = new MemoryStream())
            {
                file.CopyTo(ms);
                var fileBytes = ms.ToArray();
                //string s = Convert.ToBase64String(fileBytes);
                // act on the Base64 data
            }
        }
        return Ok();
    }
    catch (Exception ex)
    {
        return BadRequest(ex);
    }
}