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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I'm nitpicking, but starting for loop from 2 would be give the same output.
You initially had the function with a return type of Boolean when that's not recognized in C#. You need to use bool instead.