/// <summary>
        /// Parse Demographics
        /// </summary>
        public static Hl7.Fhir.Model.Demographics ParseDemographics(IFhirReader reader, ErrorList errors, Hl7.Fhir.Model.Demographics existingInstance = null)
        {
            Hl7.Fhir.Model.Demographics result = existingInstance != null ? existingInstance : new Hl7.Fhir.Model.Demographics();
            try
            {
                string currentElementName = reader.CurrentElementName;
                reader.EnterElement();

                while (reader.HasMoreElements())
                {
                    var atName = reader.CurrentElementName;
                    // Parse element extension
                    if (atName == "extension")
                    {
                        result.Extension = new List <Hl7.Fhir.Model.Extension>();
                        reader.EnterArray();

                        while (ParserUtils.IsAtArrayElement(reader, "extension"))
                        {
                            result.Extension.Add(ExtensionParser.ParseExtension(reader, errors));
                        }

                        reader.LeaveArray();
                    }

                    // Parse element _id
                    else if (atName == "_id")
                    {
                        result.LocalId = Id.Parse(reader.ReadPrimitiveContents(typeof(Id)));
                    }

                    // Parse element identifier
                    else if (atName == "identifier")
                    {
                        result.Identifier = new List <Hl7.Fhir.Model.Identifier>();
                        reader.EnterArray();

                        while (ParserUtils.IsAtArrayElement(reader, "identifier"))
                        {
                            result.Identifier.Add(IdentifierParser.ParseIdentifier(reader, errors));
                        }

                        reader.LeaveArray();
                    }

                    // Parse element name
                    else if (atName == "name")
                    {
                        result.Name = new List <Hl7.Fhir.Model.HumanName>();
                        reader.EnterArray();

                        while (ParserUtils.IsAtArrayElement(reader, "name"))
                        {
                            result.Name.Add(HumanNameParser.ParseHumanName(reader, errors));
                        }

                        reader.LeaveArray();
                    }

                    // Parse element telecom
                    else if (atName == "telecom")
                    {
                        result.Telecom = new List <Hl7.Fhir.Model.Contact>();
                        reader.EnterArray();

                        while (ParserUtils.IsAtArrayElement(reader, "telecom"))
                        {
                            result.Telecom.Add(ContactParser.ParseContact(reader, errors));
                        }

                        reader.LeaveArray();
                    }

                    // Parse element gender
                    else if (atName == "gender")
                    {
                        result.Gender = CodeableConceptParser.ParseCodeableConcept(reader, errors);
                    }

                    // Parse element birthDate
                    else if (atName == "birthDate")
                    {
                        result.BirthDate = FhirDateTimeParser.ParseFhirDateTime(reader, errors);
                    }

                    // Parse element deceased
                    else if (atName == "deceased")
                    {
                        result.Deceased = FhirBooleanParser.ParseFhirBoolean(reader, errors);
                    }

                    // Parse element address
                    else if (atName == "address")
                    {
                        result.Address = new List <Hl7.Fhir.Model.Address>();
                        reader.EnterArray();

                        while (ParserUtils.IsAtArrayElement(reader, "address"))
                        {
                            result.Address.Add(AddressParser.ParseAddress(reader, errors));
                        }

                        reader.LeaveArray();
                    }

                    // Parse element photo
                    else if (atName == "photo")
                    {
                        result.Photo = new List <Hl7.Fhir.Model.Attachment>();
                        reader.EnterArray();

                        while (ParserUtils.IsAtArrayElement(reader, "photo"))
                        {
                            result.Photo.Add(AttachmentParser.ParseAttachment(reader, errors));
                        }

                        reader.LeaveArray();
                    }

                    // Parse element maritalStatus
                    else if (atName == "maritalStatus")
                    {
                        result.MaritalStatus = CodeableConceptParser.ParseCodeableConcept(reader, errors);
                    }

                    // Parse element language
                    else if (atName == "language")
                    {
                        result.Language = new List <Hl7.Fhir.Model.Demographics.DemographicsLanguageComponent>();
                        reader.EnterArray();

                        while (ParserUtils.IsAtArrayElement(reader, "language"))
                        {
                            result.Language.Add(DemographicsParser.ParseDemographicsLanguageComponent(reader, errors));
                        }

                        reader.LeaveArray();
                    }

                    else
                    {
                        errors.Add(String.Format("Encountered unknown element {0} while parsing {1}", reader.CurrentElementName, currentElementName), reader);
                        reader.SkipSubElementsFor(currentElementName);
                        result = null;
                    }
                }

                reader.LeaveElement();
            }
            catch (Exception ex)
            {
                errors.Add(ex.Message, reader);
            }
            return(result);
        }
        public static void SerializeDemographics(Hl7.Fhir.Model.Demographics value, IFhirWriter writer)
        {
            writer.WriteStartComplexContent();

            // Serialize element _id
            if (value.LocalId != null)
            {
                writer.WritePrimitiveContents("_id", value.LocalId, XmlSerializationHint.Attribute);
            }

            // Serialize element extension
            if (value.Extension != null && value.Extension.Count > 0)
            {
                writer.WriteStartArrayElement("extension");
                foreach (var item in value.Extension)
                {
                    writer.WriteStartArrayMember("extension");
                    ExtensionSerializer.SerializeExtension(item, writer);
                    writer.WriteEndArrayMember();
                }
                writer.WriteEndArrayElement();
            }

            // Serialize element identifier
            if (value.Identifier != null && value.Identifier.Count > 0)
            {
                writer.WriteStartArrayElement("identifier");
                foreach (var item in value.Identifier)
                {
                    writer.WriteStartArrayMember("identifier");
                    IdentifierSerializer.SerializeIdentifier(item, writer);
                    writer.WriteEndArrayMember();
                }
                writer.WriteEndArrayElement();
            }

            // Serialize element name
            if (value.Name != null && value.Name.Count > 0)
            {
                writer.WriteStartArrayElement("name");
                foreach (var item in value.Name)
                {
                    writer.WriteStartArrayMember("name");
                    HumanNameSerializer.SerializeHumanName(item, writer);
                    writer.WriteEndArrayMember();
                }
                writer.WriteEndArrayElement();
            }

            // Serialize element telecom
            if (value.Telecom != null && value.Telecom.Count > 0)
            {
                writer.WriteStartArrayElement("telecom");
                foreach (var item in value.Telecom)
                {
                    writer.WriteStartArrayMember("telecom");
                    ContactSerializer.SerializeContact(item, writer);
                    writer.WriteEndArrayMember();
                }
                writer.WriteEndArrayElement();
            }

            // Serialize element gender
            if (value.Gender != null)
            {
                writer.WriteStartElement("gender");
                CodeableConceptSerializer.SerializeCodeableConcept(value.Gender, writer);
                writer.WriteEndElement();
            }

            // Serialize element birthDate
            if (value.BirthDate != null)
            {
                writer.WriteStartElement("birthDate");
                FhirDateTimeSerializer.SerializeFhirDateTime(value.BirthDate, writer);
                writer.WriteEndElement();
            }

            // Serialize element deceased
            if (value.Deceased != null)
            {
                writer.WriteStartElement("deceased");
                FhirBooleanSerializer.SerializeFhirBoolean(value.Deceased, writer);
                writer.WriteEndElement();
            }

            // Serialize element address
            if (value.Address != null && value.Address.Count > 0)
            {
                writer.WriteStartArrayElement("address");
                foreach (var item in value.Address)
                {
                    writer.WriteStartArrayMember("address");
                    AddressSerializer.SerializeAddress(item, writer);
                    writer.WriteEndArrayMember();
                }
                writer.WriteEndArrayElement();
            }

            // Serialize element photo
            if (value.Photo != null && value.Photo.Count > 0)
            {
                writer.WriteStartArrayElement("photo");
                foreach (var item in value.Photo)
                {
                    writer.WriteStartArrayMember("photo");
                    AttachmentSerializer.SerializeAttachment(item, writer);
                    writer.WriteEndArrayMember();
                }
                writer.WriteEndArrayElement();
            }

            // Serialize element maritalStatus
            if (value.MaritalStatus != null)
            {
                writer.WriteStartElement("maritalStatus");
                CodeableConceptSerializer.SerializeCodeableConcept(value.MaritalStatus, writer);
                writer.WriteEndElement();
            }

            // Serialize element language
            if (value.Language != null && value.Language.Count > 0)
            {
                writer.WriteStartArrayElement("language");
                foreach (var item in value.Language)
                {
                    writer.WriteStartArrayMember("language");
                    DemographicsSerializer.SerializeDemographicsLanguageComponent(item, writer);
                    writer.WriteEndArrayMember();
                }
                writer.WriteEndArrayElement();
            }


            writer.WriteEndComplexContent();
        }