That command class is nested within FamilyTreeViewModel, but the property that exposes it to the View is public. That code is shown below

该命令类被包含在FamilyTreeViewModel中，不过它的属性是public的方式暴露给View的。

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Command files cannot be nested.

命令文件不能嵌套。

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Navigate to some of the deeply nested folders on your hard disk that you access frequently and use the Add To Favorites command on the Favorites menu to create links in the Local Folders folder.

浏览你硬盘上经常访问的深层文件夹，使用收藏夹菜单的“添加到收藏夹”命令在本地文件夹创建链接。

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