Does the garbage collector have the ability to clear all generations in any situation?

The garbage collector in .NET uses a generational model (Generation 0, 1, and 2). It does not always clean all generations at once. Typically, collection starts with Generation 0 (young objects), and if memory is not freed sufficiently, a collection of Generation 1 occurs, followed by Generation 2 (old objects). However, in some situations, such as memory shortage or calling GC.Collect(), a full collection may be initiated, which cleans all generations. But this does not happen automatically in every situation — the collector optimizes its work to minimize the cost of collection and application pauses.