subtitle edit: visual-sync; code snippet

                // O(n^2)
                /*
                foreach (var file in Directory.GetFiles(parentDir, "*"))
                {
                    // not video file in directory where the subtitle is located
                    if (Utilities.VideoFileExtensions.Contains(Path.GetExtension(file)) == false)
                    {
                        continue;
                    }

                    string name = Path.GetFileNameWithoutExtension(file);
                    string subtitleFileName = Path.GetFileName(_subtitleFileName);

                    // video file found!
                    if (subtitleFileName.StartsWith(name, StringComparison.OrdinalIgnoreCase))
                    {
                        VideoFileName = file;
                        break;
                    }
                }
                */