public Card(Guid id, CardWord nativeLanguageWord, CardWord targetLanguageWord)
{
Id = id;
NativeLanguageWord = nativeLanguageWord;
TargetLanguageWord = targetLanguageWord;
Comment = new CardComment(null);
}
/// <summary>
/// Change the comment
/// </summary>
/// <param name="comment">A new comment</param>
public void ChangeComment(CardComment comment)
{
Comment = comment;
}