/// <summary>
/// Null-safe method for testing if the first video track meets certain criteria.
/// </summary>
/// <param name="delegate">Does NOT need to check if the video track is null. It will not be invoked if there are no video tracks.</param>
/// <returns>The delegate's return value if this playlist has a video track; otherwise false.</returns>
bool TestFirstVideoTrack(FirstVideoTrackDelegate @delegate)
{
var video = VideoTracks.FirstOrDefault();
return video != null && @delegate(video);
}
/// <summary>
/// Null-safe method for testing if the first video track meets certain criteria.
/// </summary>
/// <param name="delegate">Does NOT need to check if the video track is null. It will not be invoked if there are no video tracks.</param>
/// <returns>The delegate's return value if this playlist has a video track; otherwise false.</returns>
bool TestFirstVideoTrack(FirstVideoTrackDelegate @delegate)
{
var video = VideoTracks.FirstOrDefault();
return(video != null && @delegate(video));
}
