internal void WritePropertyReferenceExpressionElementHeader(IEdmPropertyReferenceExpression expression)
 {
     this.xmlWriter.WriteStartElement("PropertyReference");
     this.WriteRequiredAttribute <IEdmProperty>("Name", expression.ReferencedProperty, new Func <IEdmProperty, string>(EdmModelCsdlSchemaWriter.PropertyAsXml));
 }
 internal void WritePropertyReferenceExpressionElementHeader(IEdmPropertyReferenceExpression expression)
 {
     this.xmlWriter.WriteStartElement(CsdlConstants.Element_PropertyReference);
     this.WriteRequiredAttribute(CsdlConstants.Attribute_Name, expression.ReferencedProperty, PropertyAsXml);
 }