Error    CS0234 

Hi All,

Need help in rectifying the below error,

Error   CS0234 -- The type or namespace name 'FS' does not exist in the namespace 'PX.Objects' (are you missing an assembly reference?)   

I’am trying to add the AddressLine1 and AddressLine2 from customer location screen (FS300100) and adding in existing Location field - service order screen(FS300100).see below

here is my code,

and am getting the above error.