單項(xiàng)選擇題

你正在開發(fā)一個(gè)訪問文件系統(tǒng)的程序集。需要寫一個(gè)代碼段當(dāng)如果現(xiàn)有文件權(quán)限禁止使用加載程序集時(shí)來配置CLR()

A.[FileIOPermission(SecurityAction.RequestOptional,AllLocalFiles = FileIOPermissionAccess.Read)]
B.[FileIOPermission(SecurityAction.RequestMinimum, AllFiles = FileIOPermissionAccess.Read)]
C.[FileIOPermission(SecurityAction.RequestRefuse, AllFiles = FileIOPermissionAccess.Read)]
D.[FileIOPermission(SecurityAction.RequestOptional, AllFiles = FileIOPermissionAccess.Read)]

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