ArrayList list = new ArrayList();
//for遍歷
for (int i = 0; i < list.Count; i++)
{
  SE se = (SE)list[i];
  Console.WriteLine(se.Name);
}
//foreach遍歷
foreach (Object obj in list)
{
  SE se = (SE)list[i];
  Console.WriteLine(se.Name);
}

Hashtable list = new Hashtable();

//Hashtable不能用索引訪問，所以遍歷一個Hashtable只能用foreache()方法

//遍歷Key
foreach (Object obj in list.Keys)
{
  Console.WriteLine((string)obj);
}
//遍歷Value
foreach (Object obj in list.Values)
{
  SE se = (SE)obj;
  Console.WriteLine(se.Name);
}
//同時遍歷，DictionaryEntry一個結(jié)構(gòu)
foreach (DictionaryEntry en in list)
{
  Console.WriteLine(se.Keys);
  COnsole.WriteLine(((SE)en.Value).Name);
}

//for遍歷
for (int i = 0; i < list.Count; i++)
{
  //遍歷時不需要類型轉(zhuǎn)換
  Console.WriteLine(list[i]);
}
//foreach遍歷
foreach (SE obj in list)
{
  //遍歷時不需要類型轉(zhuǎn)換
  Console.WriteLine(obj);
}

//遍歷Values
foreach (SE se in list.Values)
{
  //遍歷時不需要類型轉(zhuǎn)換
  Console.WriteLine(se);
}

//同時遍歷
foreach (KeyValuePair<string, SE> en in list)
{
  Console.WriteLine(en.Key);
  Console.WriteLine(en.Value.Name);
}
//KeyValuePair<TKey,TValue>是一個泛型結(jié)構(gòu)