How can you run part of your code with a set of privileges different from those of the context user?

Running part of your code with a set of privileges different from those of the context user can be effectively achieved using UserSwitcher. This approach allows the developer to temporarily switch the user context to a different Sitecore user, which can have elevated privileges or different permissions than the context user running the code. This is particularly useful in scenarios where specific actions require different authorization levels or access to perform administrative tasks.

By utilizing UserSwitcher, a developer can encapsulate a block of code between the switching of users, ensuring that only that part of the code executes under the context of the specified user. After the operations requiring those elevated privileges are complete, the code can seamlessly switch back to the original context user, maintaining the security and integrity of the application.

Impersonation, although a similar concept, generally refers to the broader action of taking on another user's identity, which might not be as granular or directly applicable to executing code in Sitecore. SitecoreSecurity primarily deals with the management of security policies and configurations rather than providing the direct execution context switch as UserSwitcher does. RolePermission relates more to defining what roles can do but does not facilitate the action of switching user contexts in the runtime environment.