在WebService中传递SortedList, ListDictionary 和 Hashtable 参数

    在WebService中传递SortedList,ListDictionary 和 Hashtable 参数，如果直接传递，就会报错：System.NotSupportedException: The type System.Collections.sortedList is not
supported because it implements IDictionary.

通过集合类的copyTo 方法将其转化成DictionaryEntry 数组，再进行传递；客户端接收后，再将其转化成SortedList,ListDictionary 和 Hashtable 集合。

[WebMethod]
public DictionaryEntry[] HelloWorld()
{
SortedList sl = new SortedList();
sl.Add("Key","Value");
DictionaryEntry[] array = new DictionaryEntry[sl.Count];
sl.copyTo(array,0);
return array;
}

public void get(DictionaryEntry[] entries) {       SortedList list = new SortedList();        foreach (DictionaryEntry entry in entries)        {               ist.Add(entry.Key,entry.Value);        } }