It's great to hear that you found the article helpful! Let's address your question regarding the EncryptionHelper class and its key-setting method.

- The encryption key is established within the startup or program files.

- Moreover, the option of configuring it as a singleton service is indeed another effective approach. The approach used in this article draws inspiration from the practice employed in the Newtonsoft.Json library, where a similar strategy is used for registering license keys. Just like in our case, this methodology ensures consistent handling of static configurations.