Play with reflection and you might get burned...

ReflectionDemo.cs

using System;
using System.Text;
using System.Reflection;
using System.Collections.Generic;

namespace ReflectionTest
{
    public class BaseEntity : ICloneable
    {
        public object Clone()
        {            
            object newObject = Activator.CreateInstance(this.GetType());
            FieldInfo[] newFields = newObject.GetType().GetFields(BindingFlags.NonPublic | BindingFlags.Instance);
            FieldInfo[] oldFields = this.GetType().GetFields(BindingFlags.NonPublic | BindingFlags.Instance);

            for (int i = 0; i < oldFields.Length; ++i)
            {
                newFields[i].SetValue(newObject, oldFields[i].GetValue(this));
            }

            return newObject;
        }
    }

    public class PersonEntity : BaseEntity
    {
        private int age;

        public int Age
        {
            get { return age; }
            set { age = value; }
        }

        private string name;

        public string Name
        {
            get { return name; }
            set { name = value; }
        }

        public override string ToString()
        {
            return string.Format("{0}, {1} years old", name, age);
        }

        public PersonEntity QuickClone()
        {
            PersonEntity newPerson = new PersonEntity();
            newPerson.age = this.age;
            newPerson.name = this.name;
            return newPerson;
        }
    }

    public class Program
    {
        static void Main(string[] args)
        {
            PersonEntity person = new PersonEntity();
            person.Age = 20;
            person.Name = "Jonas Follesø";

            Console.WriteLine("Starting to clone...");
            for (int i = 0; i < 250000; ++i)
            {
                person.Clone();
                person.QuickClone();
            }
            Console.WriteLine("Done cloning...");
        }
    }
}