'BuildingBlock' does not contain a definition for 'GetGrade' and no accessible extension method 'GetGrade' accepting a first argument of type 'BuildingBlock' could be found (are you missing a using directive or an assembly reference?)
(BuildingGrades 51 line 472)
There is no argument given that corresponds to the required parameter 'player' of 'BuildingBlock.CanChangeToGrade(BuildingGrade.Enum, ulong, BasePlayer)'
(BuildingGrades 36 line 483)