using MpvNet.ExtensionMethod; namespace MpvNet; public class Chapter { public string Title { get; set; } = ""; public double Time { get; set; } string? _timeDisplay; public string TimeDisplay { get { if (_timeDisplay == null) { _timeDisplay = TimeSpan.FromSeconds(Time).ToString(); if (_timeDisplay.ContainsEx(".")) _timeDisplay = _timeDisplay[.._timeDisplay.LastIndexOf(".")]; } return _timeDisplay; } } }