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)]