属性值动态获取和赋值（反射、表达式、Emit）

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

using System.Linq.Expressions;

namespace Util
{
    /// <summary>
    /// 属性值动态获取和赋值（get、set）
    /// </summary>
    public class PropertyUtil
    {
        /// <summary>
        /// 反射获取对象的属性值
        /// </summary>
        /// <param name="obj"></param>
        /// <param name="propertyName"></param>
        /// <returns></returns>
        public static object ReflectGetter(object obj, string propertyName)
        {
            var type = obj.GetType();
            var propertyInfo = type.GetProperty(propertyName);
            var propertyValue = propertyInfo.GetValue(obj);
            return propertyValue;
        }


        /// <summary>
        /// 反射设置对象的属性值
        /// </summary>
        /// <param name="obj"></param>
        /// <param name="propertyName"></param>
        /// <param name="propertyValue"></param>
        public static void ReflectSetter(object obj, string propertyName, object propertyValue)
        {
            var type = obj.GetType();
            var propertyInfo = type.GetProperty(propertyName);
            propertyInfo.SetValue(obj, propertyValue);
        }


        /// <summary>
        /// 表达式获取对象的属性值
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="propertyName"></param>
        /// <returns></returns>
        public static Func<T, object> ExpresionGetter<T>(string propertyName)
        {
  &