Use of Attributes to implement security

//FileIOPermission Attribute has been used to prevent the reading of files from C Drive

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
//add these namespaces
using System.Security.Permissions;
using System.IO;
namespace ConsoleApplication20jan
{
    class Class7
    {
        [FileIOPermission(SecurityAction.Deny,Read="C:\\")]
        static void mymethod()
        {
            
            StreamReader dr = new StreamReader("c:\\windows\\abc.txt");
            Console.WriteLine(dr.ReadToEnd());
            dr.Close();
        }
        static void Main()
        {
            mymethod();

        }
    }
}