using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace PropertyNameGetPropertyValueDemo
{
 class Program
 {
  static void Main(string[] args)
  {
   Person ps = new Person();
   ps.Name = "CTZ";
   ps.Age = 21;
   Demo dm = new Demo();
   dm.Str = "String";
   dm.I = 1;
   Console.WriteLine(ps.GetValue("Name"));
   Console.WriteLine(ps.GetValue("Age"));
   Console.WriteLine(dm.GetValue("Str"));
   Console.WriteLine(dm.GetValue("I"));
  }
 }
 abstract class AbstractGetValue
 {
  public object GetValue(string propertyName)
  {
   return this.GetType().GetProperty(propertyName).GetValue(this, null);
  }
 }
 class Person : AbstractGetValue 
 {
  public string Name
  { get; set; }
 
  public int Age
  { get; set; }
 }
 class Demo : AbstractGetValue
 {
  public string Str
  { get; set; }
  public int I
  { get; set; }
 }
}

如果觉得上面比较复杂了，可以看下面的简化版。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace GetValue
{
 class Program
 {
  static void Main(string[] args)
  {
   Person ps = new Person();
   ps.Name = "CTZ";
   ps.Age = 21;
 
   Console.WriteLine(ps.GetValue("Name"));
   Console.WriteLine(ps.GetValue("Age"));
  }
 }
 class Person
 {
  public string Name
  { get; set; }
 
  public int Age
  { get; set; }
  public object GetValue(string propertyName)
  {
   return this.GetType().GetProperty(propertyName).GetValue(this, null);
  }
 }
}

实质语句只有一句：

this.GetType().GetProperty(propertyName).GetValue(this, null);