Loading collection data...
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.
You have an array in the position 0 and btw you should call string.Join instead of String.Join
Sorry I'm not a C# expert but you can share your code, mark it as spoiler and I'll try to figure out what the problem can be.