好哇！我想出如何绑定XAttribute。它不是直观，它不容易想象。但这里是如何可以做到

Hurrah !!! I figured out how to bind XAttribute. It is not intuitive and it's not easily imaginable. But here is how it can be done.

<TreeViewItem Header="{Binding Path=Attribute[Title].Value}"/>

这是很难想象标题可以直接在方括号中使用。

It is hard to imagine that Title can directly be used in square braces.

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