C#——父类中的this的指向，及用反射获取当前类所在的Type

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            Console.WriteLine("直接 new 父类");            Parent p = new Parent();            p.Print();            Console.WriteLine("直接 new 子类");            Sub s = new Sub();            s.Print();            Console.WriteLine("父类 new 子类");            Parent p2 = new Sub();            p2.Print();            Console.Read();        }    }    public class Parent     {        public void Print()        {            Console.WriteLine("第 1 种：随机应变,子就是子父就是父。获取当前实例的type");            Type t1 = this.GetType();            Console.WriteLine(t1.FullName);            Console.WriteLine("第 2 种：一定是父类. 获取执行方法所在类的type ");            Type t2 = new System.Diagnostics.StackTrace().GetFrame(0).GetMethod().DeclaringType;            Console.WriteLine(t2.FullName);            Console.WriteLine("第 3 种：一定是父类. 获取执行方法所在类对象的type");            Type t3 = System.Reflection.MethodBase.GetCurrentMethod().ReflectedType;            Console.WriteLine(t3.FullName);            Console.WriteLine("第 4 种：一定是父类. 获取声明该成员的类的type");            Type t4 = System.Reflection.MethodBase.GetCurrentMethod().DeclaringType;            Console.WriteLine(t3.FullName);            Console.WriteLine();        }    }    public class Sub : Parent    {            }}