One of the cool benefits you get with PowerShell is the ability to make use of external .NET assemblies. Lately I found myself wanting to do some scripting involving an iCalendar feed, and since I hate writing console applications every time I have some small task to perform, PowerShell seemed like a good choice. While there is no built-in support for consuming iCalendar files, the ability to augment it with an assembly meant that I could…