System.Xml.Serialization.XmlSchemaExporter.ExportEnumMapping C# (CSharp) Method

        private XmlSchemaType ExportEnumMapping(EnumMapping mapping, string ns)
        {
            if (!mapping.IncludeInSchema) throw new InvalidOperationException(SR.Format(SR.XmlCannotIncludeInSchema, mapping.TypeDesc.Name));
            XmlSchemaSimpleType dataType = (XmlSchemaSimpleType)_types[mapping];
            if (dataType == null)
            {
                CheckForDuplicateType(mapping, mapping.Namespace);
                dataType = new XmlSchemaSimpleType();
                dataType.Name = mapping.TypeName;
                if (!mapping.IsAnonymousType)
                {
                    _types.Add(mapping, dataType);
                    AddSchemaItem(dataType, mapping.Namespace, ns);
                }
                XmlSchemaSimpleTypeRestriction restriction = new XmlSchemaSimpleTypeRestriction();
                restriction.BaseTypeName = new XmlQualifiedName("string", XmlSchema.Namespace);

                for (int i = 0; i < mapping.Constants.Length; i++)
                {
                    ConstantMapping constant = mapping.Constants[i];
                    XmlSchemaEnumerationFacet enumeration = new XmlSchemaEnumerationFacet();
                    enumeration.Value = constant.XmlName;
                    restriction.Facets.Add(enumeration);
                }
                if (!mapping.IsFlags)
                {
                    dataType.Content = restriction;
                }
                else
                {
                    XmlSchemaSimpleTypeList list = new XmlSchemaSimpleTypeList();
                    XmlSchemaSimpleType enumType = new XmlSchemaSimpleType();
                    enumType.Content = restriction;
                    list.ItemType = enumType;
                    dataType.Content = list;
                }
            }
            if (!mapping.IsAnonymousType)
            {
                AddSchemaImport(mapping.Namespace, ns);
            }
            return dataType;
        }