Why Using binaries to hide a secret will only delay an attacker.

With beautiful free Reverse engineering applications like ILSpy, not a lot of things remain safe. Anyone who can load the executable in such tools can easily do reconnaissance and find secrets within your binary.

Encrypting the secret with a key embedded in the binary, and other funny puzzles do delay an attacker and just make it fun finding the secret. Be aware that, if the secret needs to be used by the executable, it eventually needs to be in memory ready to be executed.

Still need to have a secret in the binary? Make sure it can only be retrieved remotely after authenticating against a server.