When overridden in a derived class, resolves policy for the code group and its descendants for a set of evidence.
A policy statement that consists of the permissions granted by the code group with optional attributes, or null if the code group does not apply (the membership condition does not match the specified evidence).
Given evidence for an assembly to be loaded, this method evaluates the code group by checking the membership condition against the specified evidence. If there is a match, this method returns a policy statement for the code group, including evaluation of child code groups.
For a System.Security.Policy.UnionCodeGroup, all child code groups whose membership condition match the specified evidence are also resolved, and all resulting policy statements are combined with the policy statement of the parent union code group. Each child code group type determines how all child groups under it are applied, depending on how the CodeGroup.Resolve(Evidence) methods of these child groups work.
The .NET Framework security system uses CodeGroup.Resolve(Evidence) on the policy levels to determine which permissions to grant to loaded code from the resulting policy statements and the code request on the assembly.