using (SPSite site = new SPSite("http://myserver/"))

{

    SPWeb web = site.OpenWeb();

    foreach (SPList list in web.Lists)

    {

        if (String.Compare(list.Title, "MyDocumentLibrary", true) == 0)

        {

            SPDocumentLibrary docLib = (SPDocumentLibrary)list;

            // Take ownership of all checked out files in the document library

            foreach (SPCheckedOutFile checkedFile in docLib.CheckedOutFiles)

            {

                Console.WriteLine("Taking ownership of " + checkedFile.Url);

                checkedFile.TakeOverCheckOut();

            }

            // Check in all checked out files

            foreach (SPListItem item in list.Items)

            {

                SPFile file = null;

                try

                {

                    file = item.File;

                    if (file != null)

                    {

                        if (file.CheckOutStatus != SPFile.SPCheckOutStatus.None)

                        {

                            file.CheckIn("Checked in after uploading");

                            file.Update();

                            Console.WriteLine("File checked-in = " + file.Name);

                        }

                    }

                }

                catch (Exception ex)

                {

                    Console.WriteLine("Could not check-in file = " +

                                        file.Name + " : " + ex.Message);

                }

            }

        }

    }

}

Console.WriteLine("All documents checked in, press enter to close this application.");

Console.ReadLine();