PowerShell is more than strings, arrays, and hashtables — beneath the surface lies an entire .NET universe full of powerful but underused data types. This session explores types like HashSet, SortedDictionary, TimeSpan, but also datatypes that are available in .NET but many PowerShellians don't even know exist. We’ll dive into real use-cases, performance considerations, and show when and how to use these hidden gems to write cleaner and faster scripts.