SuperPutty.Data.SessionData.BackUpFiles C# (CSharp) Method

        private static void BackUpFiles(string fileName, int count)
        {
            if (File.Exists(fileName) && count > 0)
            {
                try
                {
                    // backup
                    string fileBaseName = Path.GetFileNameWithoutExtension(fileName);
                    string dirName = Path.Combine( Path.GetDirectoryName(fileName), "backup" );
                    Directory.CreateDirectory(dirName); //checks and creates only if not exist
                    string backupName = Path.Combine(dirName, string.Format("{0}.{1:yyyyMMdd_hhmmss}.XML", fileBaseName, DateTime.Now));
                    File.Copy(fileName, backupName, true);

                    // limit last count saves
                    List<string> oldFiles = new List<string>(Directory.GetFiles(dirName, fileBaseName + ".*.XML"));
                    oldFiles.Sort();
                    oldFiles.Reverse();
                    if (oldFiles.Count > count)
                    {
                        for (int i = count; i < oldFiles.Count; i++)
                        {
                            Log.InfoFormat("Cleaning up old file, {0}", oldFiles[i]);
                            File.Delete(oldFiles[i]);
                        }
                    }
                }
                catch (Exception ex)
                {
                    Log.Error("Error backing up files", ex);
                }
            }
        }