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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.
A c# string is nullable per default, unless you explicitly enable the nulllable check in the compiler, which was introduced in .NET 6+.
And even then you'll only get a warning during compilation time. If you ignore it, the program WILL crash when the string is null during runtime.
Yea, but we now know, because the input is
stringand notstring?that the input isn't null ;)