Auto repair code instead of error

[RashSnake]

When I add a attrbute for a class without partial, Lombok can add keyword 'partial'.
If it can do that, I will don't need to concern about it, learn it.

[CollinAlpert]

Unfortunately that is not how C# or Source Generators work. Lombok.NET can only add code, not modify existing code. This is why the best thing it can do is emit an error so you can make the change yourself.