Epub in Windows Phone App 8.1

I am developing a mobile app in windows phone 8.1. I need to open an epub book and tried these codes, it does not work.

How can i initialize it like this

class Program {
  static void Main(string[] args) {

        string[] files = Directory.GetFiles(@"c:\Inetpub\ePubReader\temp\load tests\");

        Console.WriteLine("Started");

        foreach (var file in files) {
            try {
                Epub epub = new Epub(file);

            } catch (Exception e) {
                Console.WriteLine("FileName: " + file + ", Exception: " + e.Message);
            }
        }
        Console.WriteLine("Finished");
        Console.ReadLine();
    }
  }
}

This does not work in window phone. Which library should I use or what exactly should I do? I want to know the process of viewing the epub book in window app ?