C# XDocument.Parse 保留空格space

一直以来在解析xml或者html的时候，都是直接Xdocument.Parse(string text)，然后取Node什么的；

最近遇到一个问题，解析的xml文章取出之后，英文空格都没有了，单词都合并到了一起。

Debug了下发现text在Parse前后，space都没有了。

于是MSDN查了下XDocument.Parse，遗漏了

LoadOptions.PreserveWhitespace。

Remarks: 
If the source XML is indented, setting the PreserveWhitespace flag in options causes the reader to read all white space in the source XML. Nodes of typeXText are created for both significant and insignificant white space.
If the source XML is indented, not setting the PreserveWhitespace flag in options causes the reader to ignore all of the insignificant white space in the source XML. The XML tree is created without any text nodes for insignificant white space.
If the source XML is not indented, setting the PreserveWhitespace flag in options has no effect. Significant white space is still preserved, and there are no spans of insignificant white space that could cause the creation of more white space text nodes.

LoadOptions另外还有2个属性：SetBaseUri和SetLineInfo。。。