private string ProcessUploadFile()
        {
            if (Foto == null)
            {
                return(string.Empty);
            }
            var uploadFolder = Path.Combine(HostEnvironment.WebRootPath, "imagenes");
            var fileName     = $"{Guid.NewGuid()}_{Foto.FileName}";
            var filePath     = Path.Combine(uploadFolder, fileName);

            using (var stream = new FileStream(filePath, FileMode.Create))
            {
                Foto.CopyTo(stream);
            }
            return(fileName);
        }