System.Xml.Xsl.XmlQueryTypeFactory.ItemType.ItemType C# (CSharp) Method

            static ItemType() {
            #if DEBUG
                Array arrEnum = Enum.GetValues(typeof(XmlTypeCode));
                Debug.Assert((XmlTypeCode) arrEnum.GetValue(arrEnum.Length - 1) == XmlTypeCode.DayTimeDuration,
                             "DayTimeDuration is no longer the last item in XmlTypeCode.  This code expects it to be.");
            #endif

                int typeCount = (int) XmlTypeCode.DayTimeDuration + 1;

                BuiltInItemTypes = new XmlQueryType[typeCount];
                BuiltInItemTypesStrict = new XmlQueryType[typeCount];

                for (int i = 0; i < typeCount; i++) {
                    XmlTypeCode typeCode = (XmlTypeCode)i;

                    switch ((XmlTypeCode) i) {
                        case XmlTypeCode.None:
                            BuiltInItemTypes[i] = ChoiceType.None;
                            BuiltInItemTypesStrict[i] = ChoiceType.None;
                            continue;

                        case XmlTypeCode.Item:
                        case XmlTypeCode.Node:
                            BuiltInItemTypes[i] = new ItemType(typeCode, XmlQualifiedNameTest.Wildcard, XmlSchemaComplexType.AnyType, false, false, false);
                            BuiltInItemTypesStrict[i] = BuiltInItemTypes[i];
                            break;

                        case XmlTypeCode.Document:
                        case XmlTypeCode.Element:
                        case XmlTypeCode.Namespace:
                        case XmlTypeCode.ProcessingInstruction:
                        case XmlTypeCode.Comment:
                        case XmlTypeCode.Text:
                            BuiltInItemTypes[i] = new ItemType(typeCode, XmlQualifiedNameTest.Wildcard, XmlSchemaComplexType.AnyType, false, false, true);
                            BuiltInItemTypesStrict[i] = BuiltInItemTypes[i];
                            break;

                        case XmlTypeCode.Attribute:
                            BuiltInItemTypes[i] = new ItemType(typeCode, XmlQualifiedNameTest.Wildcard, DatatypeImplementation.AnySimpleType, false, false, true);
                            BuiltInItemTypesStrict[i] = BuiltInItemTypes[i];
                            break;

                        case XmlTypeCode.AnyAtomicType:
                            BuiltInItemTypes[i] = new ItemType(typeCode, XmlQualifiedNameTest.Wildcard, DatatypeImplementation.AnyAtomicType, false, false, true);
                            BuiltInItemTypesStrict[i] = BuiltInItemTypes[i];
                            break;

                        case XmlTypeCode.UntypedAtomic:
                            // xdt:untypedAtomic is sealed, and therefore always strict
                            BuiltInItemTypes[i] = new ItemType(typeCode, XmlQualifiedNameTest.Wildcard, DatatypeImplementation.UntypedAtomicType, false, true, true);
                            BuiltInItemTypesStrict[i] = BuiltInItemTypes[i];
                            break;

                        default:
                            XmlSchemaType builtInType = XmlSchemaType.GetBuiltInSimpleType(typeCode);
                            BuiltInItemTypes[i] = new ItemType(typeCode, XmlQualifiedNameTest.Wildcard, builtInType, false, false, true);
                            BuiltInItemTypesStrict[i] = new ItemType(typeCode, XmlQualifiedNameTest.Wildcard, builtInType, false, true, true);
                            break;
                    }
                }


                UntypedDocument = new ItemType(XmlTypeCode.Document, XmlQualifiedNameTest.Wildcard, XmlSchemaComplexType.UntypedAnyType, false, false, true);
                UntypedElement = new ItemType(XmlTypeCode.Element, XmlQualifiedNameTest.Wildcard, XmlSchemaComplexType.UntypedAnyType, false, false, true);
                UntypedAttribute = new ItemType(XmlTypeCode.Attribute, XmlQualifiedNameTest.Wildcard, DatatypeImplementation.UntypedAtomicType, false, false, true);
                NodeNotRtf = new ItemType(XmlTypeCode.Node, XmlQualifiedNameTest.Wildcard, XmlSchemaComplexType.AnyType, false, false, true);
                NodeDod = new ItemType(XmlTypeCode.Node, XmlQualifiedNameTest.Wildcard, XmlSchemaComplexType.AnyType, false, false, true);
            }