There seems to be an issue with the introduction text for the Attack of the Trolls exercise on the C# track. It looks like parts of it have somehow been deleted. Specifically, this paragraph:
There are many predefined and reserved attributes, for example: Flags, Obsolete, Conditional, [ … ] each has a specific [ … ] that can be looked up on the C# documentation. Note that the full name of an attribute like Flags [ … ]
I added the [ … ] where something seems to be missing.