public interface IWTDFreight { DateTime EffectiveDateFrom { get; set; } DateTime EffectiveDateTo { get; set; } int FreightCode { get; set; } Fields UserFields { get; } string WTaxCode { get; set; } void FromXMLFile( string bstrFileName); void FromXMLString( string bstrXML); string GetXMLSchema(); void ToXMLFile( string bstrFileName); string ToXMLString(); }