我有一个类，该类是从RealmObject继承的，带有Birthday属性，该类是使用DatePicker输入的。但是Realm仅适用于DateTimeOffset。我怎样才能优雅地转换所有这些？

XAML

<DatePicker MinimumDate="01/01/1400"
                        MaximumDate="11/14/2019"
                        Date="{Binding Author.Birthday}" />

班主任

    public class Author : RealmObject
{
    //[PrimaryKey]
    public string Id { get; set; } = Guid.NewGuid().ToString();
    public string Name { get; set; }
    public string PhotoPath { get; set; }
    [Ignored]
    public Image Photo { get; set; }
    public DateTimeOffset? Birthday { get; set; }
    public IList<Book> Books { get; }
    public bool IsFavorite { get; set; }
}