source: OniSplit/Objects/Neutral.cs

using System;
using System.Collections.Generic;
using System.Xml;
using Oni.Metadata;

namespace Oni.Objects
{
    internal class Neutral : ObjectBase
    {
        public string Name;
        public int Id;
        public NeutralFlags Flags;
        public float TriggerRange;
        public float TalkRange;
        public float FollowRange;
        public float AbortEnemyRange;
        public string TriggerSpeech;
        public string AbortSpeech;
        public string EnemySpeech;
        public string EndScript;
        public string WeaponClass;
        public int AmmoAmount;
        public int CellAmount;
        public int HypoAmount;
        public NeutralItems OtherItems;
        public NeutralDialogLine[] Lines;

        public Neutral()
        {
            TypeId = ObjectType.Neutral;
        }

        protected override void WriteOsd(BinaryWriter writer)
        {
            writer.Write(Name, 32);
            writer.WriteUInt16(Id);
            writer.WriteUInt16(Lines.Length);
            writer.Write((int)Flags);
            writer.Write(TriggerRange);
            writer.Write(TalkRange);
            writer.Write(FollowRange);
            writer.Write(AbortEnemyRange);
            writer.Write(TriggerSpeech, 32);
            writer.Write(AbortSpeech, 32);
            writer.Write(EnemySpeech, 32);
            writer.Write(EndScript, 32);
            writer.Write(WeaponClass, 32);
            writer.WriteByte(AmmoAmount);
            writer.WriteByte(CellAmount);
            writer.WriteByte(HypoAmount);
            writer.WriteByte((byte)OtherItems);

            foreach (var line in Lines)
            {
                writer.Write((int)line.Flags);
                writer.WriteUInt16((ushort)line.AnimType);
                writer.WriteUInt16((ushort)line.OtherAnimationType);
                writer.Write(line.Speech, 32);
            }
        }

        protected override void ReadOsd(BinaryReader reader)
        {
            Name = reader.ReadString(32);
            Id = reader.ReadInt16();
            Lines = new NeutralDialogLine[reader.ReadInt16()];
            Flags = (NeutralFlags)reader.ReadInt32();
            TriggerRange = reader.ReadSingle();
            TalkRange = reader.ReadSingle();
            FollowRange = reader.ReadSingle();
            AbortEnemyRange = reader.ReadSingle();
            TriggerSpeech = reader.ReadString(32);
            AbortSpeech = reader.ReadString(32);
            EnemySpeech = reader.ReadString(32);
            EndScript = reader.ReadString(32);
            WeaponClass = reader.ReadString(32);
            AmmoAmount = reader.ReadByte();
            CellAmount = reader.ReadByte();
            HypoAmount = reader.ReadByte();
            OtherItems = (NeutralItems)reader.ReadByte();

            for (int i = 0; i < Lines.Length; i++)
            {
                Lines[i] = new NeutralDialogLine
                {
                    Flags = (NeutralDialogLineFlags)reader.ReadInt32(),
                    AnimType = (Totoro.AnimationType)reader.ReadUInt16(),
                    OtherAnimationType = (Totoro.AnimationType)reader.ReadUInt16(),
                    Speech = reader.ReadString(32)
                };
            }
        }

        protected override void ReadOsd(XmlReader xml, ObjectLoadContext context)
        {
            Name = xml.ReadElementContentAsString("Name", "");
            Id = xml.ReadElementContentAsInt("NeutralId", "");
            Flags = xml.ReadElementContentAsEnum<NeutralFlags>("Flags");
            xml.ReadStartElement("Ranges");
            TriggerRange = xml.ReadElementContentAsFloat("Trigger", "");
            TalkRange = xml.ReadElementContentAsFloat("Talk", "");
            FollowRange = xml.ReadElementContentAsFloat("Follow", "");
            AbortEnemyRange = xml.ReadElementContentAsFloat("Enemy", "");
            xml.ReadEndElement();
            xml.ReadStartElement("Speech");
            TriggerSpeech = xml.ReadElementContentAsString("Trigger", "");
            AbortSpeech = xml.ReadElementContentAsString("Abort", "");
            EnemySpeech = xml.ReadElementContentAsString("Enemy", "");
            xml.ReadEndElement();
            xml.ReadStartElement("Script");
            EndScript = xml.ReadElementContentAsString("AfterTalk", "");
            xml.ReadEndElement();
            xml.ReadStartElement("Rewards");
            WeaponClass = xml.ReadElementContentAsString("WeaponClass", "");
            AmmoAmount = xml.ReadElementContentAsInt("Ammo", "");
            CellAmount = xml.ReadElementContentAsInt("EnergyCell", "");
            HypoAmount = xml.ReadElementContentAsInt("Hypo", "");
            OtherItems = xml.ReadElementContentAsEnum<NeutralItems>("Other");
            xml.ReadEndElement();
            xml.ReadStartElement("DialogLines");

            var lineList = new List<NeutralDialogLine>();

            while (xml.IsStartElement())
            {
                xml.ReadStartElement("DialogLine");

                lineList.Add(new NeutralDialogLine
                {
                    Flags = xml.ReadElementContentAsEnum<NeutralDialogLineFlags>("Flags"),
                    AnimType = xml.ReadElementContentAsEnum<Totoro.AnimationType>("Anim"),
                    OtherAnimationType = xml.ReadElementContentAsEnum<Totoro.AnimationType>("OtherAnim"),
                    Speech = xml.ReadElementContentAsString("SpeechName", "")
                });

                xml.ReadEndElement();
            }

            Lines = lineList.ToArray();

            xml.ReadEndElement();
        }

        protected override void WriteOsd(XmlWriter xml)
        {
            throw new NotImplementedException();
        }
    }
}