Hashtable

引用类型的对象的成员也是引用类型的:

using System;
using System.Collections;

namespace HashTableDemo
{
    class Program
    {
        class Employee
        {
            public string Name;
            public int Age;
            public Employee(string name, int age)
            {
                Name = name;
                Age = age;
            }
        }

        static void Main(string[] args)
        {

            Hashtable tClass = new Hashtable();
            tClass.Add("张三".GetHashCode(), new Employee("张三", 18));
            tClass.Add("李四".GetHashCode(), new Employee("李四", 18));
            object obj = tClass["张三".GetHashCode()];
            (obj as Employee).Age = 22;

            foreach (DictionaryEntry item in tClass)
            {
                var tmp = item.Value as Employee;
                if (tmp.Name.Equals("李四"))
                {
                    tmp.Age = 19;
                }
            }
            foreach (DictionaryEntry item in tClass)
            {
                var tmp = item.Value as Employee;
                Console.WriteLine(tmp.Name + ":" + tmp.Age);
            }
        }

    }
}

运行结果：

张三:22
李四:19
请按任意键继续. . .