FileIOPermissionAccess.AllAccess

   
 
using System;
using System.Collections.Generic;
using System.Text;
using System.Security;
using System.Security.Permissions;

class Program {
    static void Main(string[] args) {
        CodeAccessPermission permissionA = new FileIOPermission(FileIOPermissionAccess.AllAccess, @"C:");
        CodeAccessPermission permissionB = new FileIOPermission(FileIOPermissionAccess.Read, @"C:	emp");
        if (permissionB.IsSubsetOf(permissionA)) {
            Console.WriteLine("PermissionB is a subset of PermissionA");
        } else {
            Console.WriteLine("PermissionB is NOT a subset of PermissionA");
        }
    }
}