C# WP7可观察收集排序

我有一个收藏：

public ObservableCollection<Shops> ShopList { get; set; }

ShopList现在有4个空元素。为什么会这样？如何更正代码？

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谢谢

这是正确的顺序：

var orderedlist = ShopList.OrderBy(k => k.Name);
ShopList.Clear();
foreach (Shops s in orderedlist)
    ShopList.Add((Shops)s);

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ShopList.Clear（）清除列表：）是的，我很笨，顺序错误：dd也许你对
SortedObservableCollection
感兴趣：这对我不好，orderedlist将有空元素如果你清除shoplist，我设法解决了它购买将元素复制到新集合，然后清除
var orderedlist = ShopList.OrderBy(k => k.Name);
ShopList.Clear();
foreach (Shops s in orderedlist)
    ShopList.Add((Shops)s);