使用this 调用另一个构造器

当我们需要使用多个构造器的时候，为了减少代码量，可以使用this来调用自身的构造器

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ALTest.Employee
{
    class Employee2
    {

        public Employee2(string firstName, string lastName)
        {
            FirstName = firstName;
            LastName = lastName;
        }


        //  :this (firstName,lastName) 调用了 public Employee2(string firstName, string lastName) 构造器
        public Employee2(
            int id,string firstName, string lastName)
            :this (firstName,lastName)
        {
            Id = id;
        }


        public int Id { get; set; }
        public string FirstName { get; private set; }
        public string LastName { get; private set; }
        public string  Salary { get; set; }
        public string Title { get; set; }

    }
}