程序集只能访问“打开文件”对话框和“保存文件”对话框，并且可通过这两个对话框打开和保存文件。该权限允许程序集获取或保持文件的内容，而不必打开文件或被授予对这些文件的“文件 IO 权限”。

Assemblies only have access to the Open File dialog box and Save File dialog box, and are permitted to open and save files through these dialogs. This permission allows assemblies to obtain or persist the contents of a file without opening the file or being granted File IO Permission to those files.