HouseCool.AutoMapper.Extensions.DependencyInjection 1.0.2

class User
{
    public string NickName { set; get; }
    public string Id { set; get; }
    public long Count { get; set; }
    public string CreateTime { get; set; }
    public DateTime Time { set; get; }
}
class UserEntity
{
    public Guid Id { get; set; }
    public string Name { get; set; }
    public int MyProperty { get; set; }
    public DateTimeOffset Date = DateTimeOffset.UtcNow;
    public string Time { get; set; } = "2018/07/22";
}
public ActionResult<IEnumerable<string>> Get([FromServices] IMapper mapper)
{
    var usere = new[] {
        new UserEntity
        {
            Id = Guid.NewGuid(),
            Name = "NewUser",
        },
        new UserEntity
        {
            Id = Guid.NewGuid(),
            Name = "NewUser",
            MyProperty=955
        }
    };
    var user = usere.Map<UserEntity, User>(x =>
    {
        x.Member(o => o.Name, o => o.NickName);
        x.Member(o => o.MyProperty, o => o.Count);
        x.Member(o => o.Date, o => o.CreateTime);
    });

   //OR
   var old = db.Users.ToArray();
   u.Map(old,(a, b) => Guid.Parse(a.Id) == b.Id,
         x =>
         {
             x.Member(o => o.NickName, o => o.Name);
             x.Member(o => o.Count, o => o.MyProperty);
             x.Member(o => o.CreateTime, o => o.Time);
         });   
    db.SaveChanges();
    return new string[] { "value1", "value2" };
}