static void Main(string[] args)
{
        Student stu = new Student()
        {
           Id = 1,
           StudentAddress="北京",
           StudentName="C#程序"
        };

       Console.WriteLine("---------------- 通过反射操作字段和属性等成员-----------");
       Assembly assembly = Assembly.LoadFrom("DB.MySqlClass.dll");  //加载方式三,完全限定名
       Type type = assembly.GetType("DB.MySqlClass.Student"); //获取到类型名称3个参数。
       object oStudent = Activator.CreateInstance(type); //实例化类型
       foreach (var prop in type.GetProperties())
       {
           Console.WriteLine($"{prop.PropertyType}，{prop.Name}, {prop.GetValue(stu)}");

           Console.WriteLine("-----------------------------------------------------");
           if (prop.Name.Equals("Id"))
           {
                 prop.SetValue(stu, 2);
           }
           if (prop.Name.Equals("StudentName"))
           {
               prop.SetValue(stu, "PLC知识");
            }
            if (prop.Name.Equals("StudentAddress"))
            {
                 prop.SetValue(stu, "上海");
             }
            Console.WriteLine($"{prop.PropertyType}，{prop.Name}, {prop.GetValue(stu)}");
       }
        //方式二
        //PropertyInfo[] propertyInfos = type.GetProperties();//查找所有的属性
        //PropertyInfo propertyInfo = type.GetProperty("Id"); //查找Id的属性
}

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

namespace DB.MySqlClass
{
    public class Student
    {
        public int Id { get; set; }
        public string StudentName { get; set; }
        public string StudentAddress { get; set; }
        public int age;
        public void Test()
        {

        }             
    }
}