using System; namespace VersOne.Epub.Schema { /// /// Represents a language of the content of the EPUB book. /// /// See , /// , /// and for more information. /// /// public class EpubMetadataLanguage { /// /// Initializes a new instance of the class. /// /// The language tag. /// The unique ID of this language metadata element or null if the language metadata element doesn't have an ID. /// The parameter is null. public EpubMetadataLanguage(string language, string? id = null) { Language = language ?? throw new ArgumentNullException(nameof(language)); Id = id; } /// /// Gets the language tag. /// /// See /// and for more information. /// /// public string Language { get; } /// /// Gets the unique ID of this language metadata element or null if the language metadata element doesn't have an ID. /// See for more information. /// public string? Id { get; } } }