The best practice for mapping Database and XML to objects

I work on data layer in my project, where I need create mappers for stored data in xml and in database. What is the best practice for that? Should I use Mapper design patter or is any better solution?

For example:

public class Task
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Text { get; set; }
    public DateTime Deadline { get; set; }
    public int EnteredEmployeeId { get; set; }
    public int ResponsibleEmployeeId { get; set; }
    public int StateId { get; set; }
    public int DefficultyId { get; set; }
}

This is my entity. How will be mappers looks like please? Thanks