File Stream C#

using System;
using System.IO;
using System.Security.AccessControl;
    class FileExample
    {
        public static void Main()
        {
                string FileName = "test.xml";
                AddEncryption(FileName);
                Console.WriteLine("Decrypt " + FileName);
                RemoveEncryption(FileName);
        }
        public static void AddEncryption(string FileName)
        {
            File.Encrypt(FileName);
        }
        public static void RemoveEncryption(string FileName)
        {
            File.Decrypt(FileName);
        }
    }