IIS security settings and different permission using installer class with custom action

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration.Install;
using System.Linq;
using System.IO;
using System.Diagnostics;
using Microsoft.Web.Administration;
using Microsoft.Web.Management;
using System.Configuration;
using System.Security.AccessControl;
using System.IO;

namespace IISsettings
{
    [RunInstaller(true)]
    public partial class InstallerIISsettings : System.Configuration.Install.Installer
    {
        public InstallerIISsettings()
        {
            InitializeComponent();
        }

        [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand)]
        public override void Install(IDictionary stateSaver)
        {

            base.Install(stateSaver);

            stateSaver.Add("targetvdir", Context.Parameters["targetvdir"].ToString());
           
            configureIIS(Context.Parameters["targetvdir"].ToString());
            if (!EventLog.SourceExists("SampleApplication"))
            {
                EventSourceCreationData mySource = new EventSourceCreationData("SampleApplication", "SampleApplicationLogs");
                EventLog.CreateEventSource(mySource);
                EventLog.WriteEntry("SampleApplication", "SampleApplication IIS Settings done.");
                EventLog.WriteEntry("SampleApplication", "targetvdir..." + Context.Parameters["targetvdir"].ToString());
            }
            else
            {
                EventLog.WriteEntry("SampleApplication", "SampleApplication IIS Settings done.");
                EventLog.WriteEntry("SampleApplication", "targetvdir..." + Context.Parameters["targetvdir"].ToString());
            }

            stateSaver.Add("targetdir", Context.Parameters["targetdir"].ToString());
            DirectorySecurity dirSec = Directory.GetAccessControl(@Context.Parameters["targetdir"].ToString());
            FileSystemAccessRule fsar = new FileSystemAccessRule("Everyone",
                                                                FileSystemRights.FullControl,
                                                                InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit,
                                                                PropagationFlags.None,
                                                                AccessControlType.Allow);
            dirSec.AddAccessRule(fsar);
            FileSystemAccessRule fNet = new FileSystemAccessRule("NETWORK",
                                                                  FileSystemRights.FullControl,
                                                                  InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit,
                                                                  PropagationFlags.None,
                                                                  AccessControlType.Allow);

            dirSec.AddAccessRule(fNet);
            FileSystemAccessRule fNetServ = new FileSystemAccessRule("NETWORK SERVICE",
                                                                FileSystemRights.FullControl,
                                                                InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit,
                                                                PropagationFlags.None,
                                                                AccessControlType.Allow);
            dirSec.AddAccessRule(fNetServ);
            Directory.SetAccessControl(@Context.Parameters["targetdir"].ToString(), dirSec);


        }

        /// <summary>
        /// This method change the security setting of iis for particular web application name specified during the setup 
        /// </summary>
        /// <param name="vdName"></param>
        private void configureIIS(string vdName)
        {
            using (ServerManager serverManager = new ServerManager())
            {
                Microsoft.Web.Administration.Configuration config = serverManager.GetApplicationHostConfiguration();
                Microsoft.Web.Administration.ConfigurationSection anonymousAuthenticationSection = config.GetSection("system.webServer/security/authentication/anonymousAuthentication", "Default Web Site/" + vdName);
                anonymousAuthenticationSection["enabled"] = false;
                Microsoft.Web.Administration.ConfigurationSection windowsAuthenticationSection = config.GetSection("system.webServer/security/authentication/windowsAuthentication", "Default Web Site/" + vdName);
                windowsAuthenticationSection["enabled"] = true;
                serverManager.CommitChanges();
            }
        }

        [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand)]
        public override void Commit(IDictionary savedState)
        {
            base.Commit(savedState);
            savedState.Add("targetdir", Context.Parameters["targetdir"].ToString());
            DirectorySecurity dirSec = Directory.GetAccessControl(("@" + Context.Parameters["targetdir"].ToString()));
            FileSystemAccessRule fsar = new FileSystemAccessRule(@"NETWORK SERVICE",
                                                                FileSystemRights.FullControl,
                                                                InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit,
                                                                PropagationFlags.None,
                                                                AccessControlType.Allow);
            dirSec.AddAccessRule(fsar);
            Directory.SetAccessControl("@" + Context.Parameters["targetdir"].ToString(), dirSec);


        }

        [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand)]
        public override void Rollback(IDictionary savedState)
        {
            base.Rollback(savedState);
        }

        [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand)]
        public override void Uninstall(IDictionary savedState)
        {
            base.Uninstall(savedState);
        }

    }
}