问实体框架DB-First -我可以从基础模型继承以添加我的功能吗？

EN

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated from a template.
//
//     Manual changes to this file may cause unexpected behavior in your application.
//     Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

namespace InvoiceRegister.Models
{
    using System;
    using System.Collections.Generic;

    public partial class InvoiceLine
    {
        public int DocEntry { get; set; }
        public int LineId { get; set; }
        public int LineNum { get; set; }
        public string ItemName { get; set; }
        public double Amount { get; set; }
        public int TaxPrc { get; set; }
        public decimal NetAmnt { get; set; }
        public decimal TaxAmnt { get; set; }
        public decimal TotalAmnt { get; set; }
        public decimal Price { get; set; }

        public virtual Invoice Invoice { get; set; }
    }
}

namespace InvoiceRegister.Models
{
    public class InvoiceLineModel : InvoiceLine, INotifyPropertyChanged
    {
        private double _amount;

        public new double Amount
        {
            get { return _amount; }
            set
            {
                _amount = value;
                OnPropertyChanged("Amount");
                OnPropertyChanged("NetAmnt");
                OnPropertyChanged("TaxAmnt");
                OnPropertyChanged("TotalAmnt");
            }
        }

        private decimal _price;

        public new decimal Price
        {
            get { return _price; }
            set
            {
                _price = value;
                OnPropertyChanged("Price");
                OnPropertyChanged("NetAmnt");
                OnPropertyChanged("TaxAmnt");
                OnPropertyChanged("TotalAmnt");
            }
        }

        private int _taxPrc;

        public new int TaxPrc
        {
            get { return _taxPrc; }
            set
            {
                _taxPrc = value;
                OnPropertyChanged("TaxPrc");
                OnPropertyChanged("TaxAmnt");
                OnPropertyChanged("TotalAmnt");
            }
        }


        public new decimal TaxAmnt
        {
            get
            {
                return NetAmnt* TaxPrc/100;
            }
        }


        public new decimal NetAmnt
        {
            get
            {
                return  (decimal)Amount * Price;
            }
        }

        public new decimal TotalAmnt
        {
            get {return NetAmnt + TaxAmnt; }
        }

        public InvoiceLineModel()
        {
            this.LineNum = InvoiceViewModel.getNextLineNum();
        }
        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged(string name)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        }
    }
}