Publishing Pages : check-in file programmatically

One of the common scenarios when working with content migration is to handle the files checked out by other users. Following code is written to check-in all files check out by any users.

class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Please enter site url");
            
            using (SPSite site = new SPSite(Console.ReadLine()))
            {
                using (SPWeb web = site.OpenWeb())
                {
                    PublishingPageCollection publishingPages = PublishingWeb.GetPublishingWeb(web).GetPublishingPages();

                    foreach (PublishingPage page in publishingPages)
                    {
                        SPFile file = page.ListItem.File;
                        if (file.CheckedOutByUser != null)
                        {
                            Console.WriteLine("The page {0} is check out by user {1}. Check-in in to take control.", file.Title, file.CheckedOutByUser);

                            file.CheckIn("checked in by script", SPCheckinType.MajorCheckIn);
                            SPModerationInformation moderationInformation = page.ListItem.ModerationInformation;
                            if (moderationInformation.Status == SPModerationStatusType.Pending)
                            {
                                file.Approve("Approved by script");
                            }
                            if (moderationInformation.Status == SPModerationStatusType.Draft)
                            {
                                file.Publish("Published using script");
                                file.Approve("Approved by script");
                            }
                        }
                    }
                }
            }
        }
    }