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

namespace PersonDemo2
{
    /// <summary>
    /// 性别
    /// </summary>
    public enum Gender
    {
        Female,Man
    }

   public class Person
   {
       #region 
       protected string name;
       private Gender gender;
       private string hobby;
       protected int age;
       #endregion

       public Person()
       {
       }

       public string Name
       {
           get { return name; }
           set { name = value; }
       }
       public Gender Gender
       {
           get { return gender; }
           set { gender = value; }
       }
       public string Hobby
       {
           get { return hobby; }
           set { hobby = value; }
       }

       public virtual void Speak(string msg)
       {
           Console.WriteLine(name+"说"+msg);
       }

       public void ShowInfo()
       {
           Console.WriteLine("{0} {1} {2} {3}",name,gender,hobby,age);
       }

       public virtual void Study()
       {
           Console.WriteLine("so bad!");
       }
   }
}

Person