abp viewmodel的写法

public class QuotaCreateOrEditViewModel
    {
        public QuotaDto LoanQuota { get; set; }
        public bool IsEditMode => LoanQuota.Id.HasValue;
    }

  [AutoMapFrom(typeof(QuotaDto))]
    public class CreateOrEditQuotaModalViewModel : QuotaDto
    {
        public bool IsEditMode
        {
            get { return Id.HasValue; }
        }
        public CreateOrEditQuotaModalViewModel(QuotaDto output)
        {
            output.MapTo(this);
        }
    }

 var viewModel =new QuotaCreateOrEditViewModel
            {
                LoanQuota=output
            };

 var viewModel = new CreateOrEditQuotaModalViewModel(output);