System 2.0.0.0 4.0.0.0 System.Enum To be added. Specifies whether the template can be bound one way or two ways. Field 2.0.0.0 4.0.0.0 System.ComponentModel.BindingDirection The template can only accept property values. Used with a generic . Field 2.0.0.0 4.0.0.0 System.ComponentModel.BindingDirection The template can accept and expose property values. Used with an .