[HttpPost]
    public string PostData(string inNameFile, bool detailComm = false)
    {
        string rootPath = _hostingEnvironment.WebRootPath;
        string fileName = rootPath + "\\Temp\\" + inNameFile;
        using (var memoryStream = new MemoryStream())
        {
            Request.Body.CopyTo(memoryStream);
            var value = new byte[Convert.ToInt32(memoryStream.Length)];
            value = memoryStream.ToArray();

            using (var file = new FileStream(fileName, FileMode.Create))
            {
                for (int i = 0; i < value.Length; i++)
                {
                    file.WriteByte(value[i]);
                }
                file.Dispose(); //удаляем архив
            }
        }

//....  работа с распаковкой zip и анализом-загрузкой файлов

}