FileIOPermission.Intersect(IPermission) Method

Definition

创建并返回一个权限,该权限是当前权限与指定权限的交集。Creates and returns a permission that is the intersection of the current permission and the specified permission.

public:
 override System::Security::IPermission ^ Intersect(System::Security::IPermission ^ target);
public override System.Security.IPermission Intersect (System.Security.IPermission target);
override this.Intersect : System.Security.IPermission -> System.Security.IPermission
Public Overrides Function Intersect (target As IPermission) As IPermission

Parameters

target
IPermission

要与当前权限相交的权限。A permission to intersect with the current permission. 它必须与当前权限属于同一类型。It must be the same type as the current permission.

Returns

IPermission

表示当前权限和指定权限的交集的一个新权限。A new permission that represents the intersection of the current permission and the specified permission. 如果交集为空,则此新权限为 nullThis new permission is null if the intersection is empty.

Exceptions

target 参数不为 null,并且与当前权限不属于同一类型。The target parameter is not null and is not of the same type as the current permission.

Remarks

两个权限的交集是描述它们共同描述的一组操作的权限。The intersection of two permissions is a permission that describes the set of operations they both describe in common. 只有同时传递两个原始权限的请求才会传递交集。Only a demand that passes both original permissions will pass the intersection.

Applies to