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Review imperative security

TypeName

ReviewImperativeSecurity

CheckId

CA2103

Category

Microsoft.Security

Breaking Change

Breaking

A method uses imperative security and might be constructing the permission using state information or return values that can change while the demand is active.

Imperative security uses managed objects to specify permissions and security actions during code execution, as opposed to declarative security, which uses attributes to store permissions and actions in metadata. Imperative security is extremely flexible because you can set the state of a permission object and select security actions using information that is not available until run time. With that flexibility comes the risk that the runtime information you use to determine a permission's state does not remain unchanged while the action is in effect.

Use declarative security whenever possible. Declarative demands are easier to understand and can be detected by tools such as Permissions View Tool (Permview.exe).

Review the imperative security demands to ensure that the state of the permission does not rely on information that can change while the permission is in use.

It is safe to exclude a warning from this rule if the permission does not rely on changing data; however, it is preferable to change the imperative demand to its declarative equivalent.

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