How to use localText in Placehold attribution?

[DisplayName("Sales Desc"), Size(250),Placeholder(Texts.Db.Product.ProdcutTemp.SalesDescription)]
        [TextAreaEditor]
        public String SalesDesc
        {
            get { return Fields.SalesDesc[this]; }
            set { Fields.SalesDesc[this] = value; }
        }

Placeholder("Db.Product.ProdcutTemp.SalesDescription")