Thanks for the advice. There is progress.
[F] 18:00:02 - [Spell] Cast Fishing (Fishing)
[E] 18:00:04 - Compilator Error :
c:\Users\User\AppData\Local\Temp\0dzrh0hh.0.cs(26,41) : error CS1061: 'wManager.Wow.Class.Spell' does not contain a definition for 'SearchBobber' and no extension method 'SearchBobber' accepting a first argument of type 'wManager.Wow.Class.Spell' could be found (are you missing a using directive or an assembly reference?)
[E] 18:00:04 - Cannot run code, look log.
[F] 18:00:14 - [Spell] Cast Fishing (Fishing)
I guess SearchBobber has to be named correctly then.