System.Xml.Serialization.XmlSerializationWriter.WriteArray C# (CSharp) Method

        private void WriteArray(string name, string ns, object o, Type type)
        {
            Type elementType = TypeScope.GetArrayElementType(type, null);
            string typeName;
            string typeNs;

            StringBuilder arrayDims = new StringBuilder();
            if (!_soap12)
            {
                while ((elementType.IsArray || typeof(IEnumerable).IsAssignableFrom(elementType)) && GetPrimitiveTypeName(elementType, false) == null)
                {
                    elementType = TypeScope.GetArrayElementType(elementType, null);
                    arrayDims.Append("[]");
                }
            }

            if (elementType == typeof(object))
            {
                typeName = Soap.UrType;
                typeNs = XmlSchema.Namespace;
            }
            else
            {
                TypeEntry entry = GetTypeEntry(elementType);
                if (entry != null)
                {
                    typeName = entry.typeName;
                    typeNs = entry.typeNs;
                }
                else if (_soap12)
                {
                    XmlQualifiedName qualName = GetPrimitiveTypeName(elementType, false);
                    if (qualName != null)
                    {
                        typeName = qualName.Name;
                        typeNs = qualName.Namespace;
                    }
                    else
                    {
                        Type elementBaseType = elementType.GetTypeInfo().BaseType;
                        while (elementBaseType != null)
                        {
                            entry = GetTypeEntry(elementBaseType);
                            if (entry != null) break;
                            elementBaseType = elementBaseType.GetTypeInfo().BaseType;
                        }
                        if (entry != null)
                        {
                            typeName = entry.typeName;
                            typeNs = entry.typeNs;
                        }
                        else
                        {
                            typeName = Soap.UrType;
                            typeNs = XmlSchema.Namespace;
                        }
                    }
                }
                else
                {
                    XmlQualifiedName qualName = GetPrimitiveTypeName(elementType);
                    typeName = qualName.Name;
                    typeNs = qualName.Namespace;
                }
            }

            if (arrayDims.Length > 0)
                typeName = typeName + arrayDims.ToString();

            if (_soap12 && name != null && name.Length > 0)
                WriteStartElement(name, ns, null, false);
            else
                WriteStartElement(Soap.Array, Soap.Encoding, null, true);

            WriteId(o, false);

            if (type.IsArray)
            {
                Array a = (Array)o;
                int arrayLength = a.Length;
                if (_soap12)
                {
                    _w.WriteAttributeString("itemType", Soap12.Encoding, GetQualifiedName(typeName, typeNs));
                    _w.WriteAttributeString("arraySize", Soap12.Encoding, arrayLength.ToString(CultureInfo.InvariantCulture));
                }
                else
                {
                    _w.WriteAttributeString("arrayType", Soap.Encoding, GetQualifiedName(typeName, typeNs) + "[" + arrayLength.ToString(CultureInfo.InvariantCulture) + "]");
                }
                for (int i = 0; i < arrayLength; i++)
                {
                    WritePotentiallyReferencingElement("Item", "", a.GetValue(i), elementType, false, true);
                }
            }
            else
            {
#if DEBUG
                    // use exception in the place of Debug.Assert to avoid throwing asserts from a server process such as aspnet_ewp.exe
                    if (!typeof(IEnumerable).IsAssignableFrom(type)) throw new InvalidOperationException(SR.Format(SR.XmlInternalErrorDetails, "not array like type " + type.FullName));
#endif

                int arrayLength = typeof(ICollection).IsAssignableFrom(type) ? ((ICollection)o).Count : -1;
                if (_soap12)
                {
                    _w.WriteAttributeString("itemType", Soap12.Encoding, GetQualifiedName(typeName, typeNs));
                    if (arrayLength >= 0)
                        _w.WriteAttributeString("arraySize", Soap12.Encoding, arrayLength.ToString(CultureInfo.InvariantCulture));
                }
                else
                {
                    string brackets = arrayLength >= 0 ? "[" + arrayLength + "]" : "[]";
                    _w.WriteAttributeString("arrayType", Soap.Encoding, GetQualifiedName(typeName, typeNs) + brackets);
                }
                IEnumerator e = ((IEnumerable)o).GetEnumerator();
                if (e != null)
                {
                    while (e.MoveNext())
                    {
                        WritePotentiallyReferencingElement("Item", "", e.Current, elementType, false, true);
                    }
                }
            }
            _w.WriteEndElement();
        }
        protected void WritePotentiallyReferencingElement(string n, string ns, object o)