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

        protected void WritePotentiallyReferencingElement(string n, string ns, object o, Type ambientType, bool suppressReference, bool isNullable)
        {
            if (o == null)
            {
                if (isNullable) WriteNullTagEncoded(n, ns);
                return;
            }
            Type t = o.GetType();
            if (t.GetTypeCode() == TypeCode.Object && !(o is Guid) && (t != typeof(XmlQualifiedName)) && !(o is XmlNode[]) && (t != typeof(byte[])))
            {
                if ((suppressReference || _soap12) && !IsIdDefined(o))
                {
                    WriteReferencedElement(n, ns, o, ambientType);
                }
                else
                {
                    if (n == null)
                    {
                        TypeEntry entry = GetTypeEntry(t);
                        WriteReferencingElement(entry.typeName, entry.typeNs, o, isNullable);
                    }
                    else
                        WriteReferencingElement(n, ns, o, isNullable);
                }
            }
            else
            {
                // Enums always write xsi:type, so don't write it again here.
                bool needXsiType = t != ambientType && !t.GetTypeInfo().IsEnum;
                TypeEntry entry = GetTypeEntry(t);
                if (entry != null)
                {
                    if (n == null)
                        WriteStartElement(entry.typeName, entry.typeNs, null, true);
                    else
                        WriteStartElement(n, ns, null, true);

                    if (needXsiType) WriteXsiType(entry.typeName, entry.typeNs);
                    entry.callback(o);
                    _w.WriteEndElement();
                }
                else
                {
                    WriteTypedPrimitive(n, ns, o, needXsiType);
                }
            }
        }