Download and Upload files via Web API

FileController.cs

    [Route("api/[controller]")]
    public class FilesController : ControllerBase
    {
        [HttpGet]
        public async Task<IActionResult> Download(string filename)
        {
            if (filename == null)
                return Content("filename not present");

            var path = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "download", filename);

            var memory = new MemoryStream();
            using (var stream = new FileStream(path, FileMode.Open))
            {
                await stream.CopyToAsync(memory);
            }
            memory.Position = 0;

            return File(memory, MimeTypeMap.GetMimeType(Path.GetExtension(path)), Path.GetFileName(path));
        }

        [HttpPost]
        public async Task<IActionResult> Upload(IFormFile uploadedFile)
        {
            if (uploadedFile == null || uploadedFile.Length == 0)
                return Content("file not selected");

            var path = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", uploadedFile.FileName);

            using (var stream = new FileStream(path, FileMode.Create))
            {
                await uploadedFile.CopyToAsync(stream);
            }

            return Ok();
        }
    }