如何：隐藏解决方案文件夹。
描述如何对视图隐藏解决方案文件夹及其包含的所有项目和项，但仍使这些项目在解决方案中可用。
Describes how to hide from view a solution Folder and all the projects and items that it contains but still have the projects available in the solution.
不能向解决方案中添加此项目，因为在某个隐藏的解决方案文件夹内的解决方案中，此项目已经存在。
This project cannot be added to the solution because it already exists in the solution in a hidden solution Folder.
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