The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'JsonConverterAttribute' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'JsonConverter' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'StringEnumConverter' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)