How to Change the UI Version of the Sharepoint Using Console Application

How to Change the UI Version of the Sharepoint Using Console Application:

After Migrate Sharepoint 2007 to Sharepoint 2010,you need change the version of your site otherwise it looks similar to Sharepoint 2007 site.

using System;

using System.Collections.Generic;

using System.Linq;

using System.IO;

using System.Text;

using Microsoft.SharePoint;

using System.Collections.ObjectModel;

using Microsoft.SharePoint.Utilities;

using Microsoft.SharePoint.Administration;

namespace VisualUpgrade

{

    class Program

    {

        static void Main(string[] args)

        {

            using (SPSite siteCollection = new SPSite("http://server/sites/"))

            {

                SPWebCollection sites = siteCollection.AllWebs;

                foreach (SPWeb site in sites)

                {

                    try

                    {

                        Console.WriteLine("Site Version: {0}  Site Version Configuration: {1}",      

                        site.UIVersion.ToString(),  site.UIVersionConfigurationEnabled.ToString());

                        Console.WriteLine(site.Title + site.Url);

                        site.UIVersion = 4; //UI Version 3 or 4

                        site.UIVersionConfigurationEnabled = true;

                        site.Update();

                        Trace(site.Title + "********" + site.Url); //Log file

                    }

                    finally

                    {

                        if (site != null)

                            site.Dispose();

                    }

                }

            }

            Console.Read();

        }

        public static void Trace(string stritrace)

        {

            Stream codeFile = File.Open("c:\\Logs.txt", FileMode.Append);

            StreamWriter Tex = new StreamWriter(codeFile); ;

            Tex.WriteLine(DateTime.Now.ToString() + " " + stritrace);

            Tex.Write(Tex.NewLine);

            Tex.Close();

        }

    }

}