每个职责类包含职责类对象，如果自己处理不了，交给职责类处理

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


namespace DesignPytternDemo
{




    public abstract class DataTypeHandler
    {
        protected DataTypeHandler _handler;
        public void SetHandler(DataTypeHandler handler)
        {
            this._handler = handler;
        }


        public abstract void Handle(object data);


    }


    public class IntHandler : DataTypeHandler
    {


        public override void Handle(object data)
        {
            if (data is int)
            {
                Console.WriteLine("int handler handle it!");
            }
            else
            {
                if (this._handler != null)
                {
                    this._handler.Handle(data);
                }
            }
        }
    }


    public class BoolHandler : DataTypeHandler
    {
        public override void Handle(object data)
        {
            if (data is bool)
            {
                Console.WriteLine("BoolHandler handler handle it!");
            }
            else
            {
                if (this._handler != null)
                {
                    this._handler.Handle(data);
                }
            }
        }
    }


    public class DoubleHandler : DataTypeHandler
    {
        public override void Handle(object data)
        {
            if (data is double)
            {
                Console.WriteLine("double handler handle it!");
            }
            else
            {
                if (this._handler != null)
                {
                    this._handler.Handle(data);
                }
            }
        }
    }




}



            DataTypeHandler bh1 = new IntHandler();
            DataTypeHandler bh2 = new BoolHandler();
            DataTypeHandler bh3 = new DoubleHandler();
            bh1.SetHandler(bh2);
            bh2.SetHandler(bh3);
            int a = 1;
            bool b = true;
            double c = 1.2;
            bh1.Handle(a);
            bh1.Handle(b);
            bh1.Handle(c);