public class CPeople : DictionaryBase, ICloneable
    {
        public new IEnumerator GetEnumerator()
        {
            foreach (object person in Dictionary.Values) yield return (CPerson)person;
        }
    }
    
    CPeople pl;
    IEnumerable<CPerson> sortedPeple =
                from CPerson in pl
                orderby CPerson.Name.Length, CPerson.Name
                select CPerson;
    foreach (CPerson person in sortedPeple)
    {
        ListViewItem item = listView.Items.Add(person.Name);
        item.SubItems.Add(person.Age.ToString());
    }

public new

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参考：

http://blog.csdn.net/q107770540/article/details/6010387

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另外，还要实现这个INTERFACE。或者

IEnumerable<CPerson> sortedPeple =
                       from  CPerson x in pl
                       orderby x.Name.Length, x.Name
                       select x;

也行。问题是因为IEnumerable.current只返回object, 编译器无法确定x的类型

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