source: OniSplit/Objects/Particle.cs

using System;
using System.Xml;
using Oni.Metadata;
using Oni.Xml;

namespace Oni.Objects
{
    internal class Particle : ObjectBase
    {
        public string ClassName;
        public string Tag;
        public ParticleFlags Flags;
        public Vector2 DecalScale = new Vector2(1.0f, 1.0f);

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

        protected override void WriteOsd(BinaryWriter writer)
        {
            writer.Write(ClassName, 64);
            writer.Write(Tag, 48);
            writer.Write((ushort)Flags);
            writer.Write(DecalScale);
        }

        protected override void ReadOsd(BinaryReader reader)
        {
            ClassName = reader.ReadString(64);
            Tag = reader.ReadString(48);
            Flags = (ParticleFlags)reader.ReadUInt16();
            DecalScale = reader.ReadVector2();
        }

        protected override void WriteOsd(XmlWriter xml)
        {
            xml.WriteElementString("Class", ClassName);
            xml.WriteElementString("Tag", Tag);
            xml.WriteElementString("Flags", MetaEnum.ToString<ParticleFlags>(Flags));
            xml.WriteElementString("DecalScale", XmlConvert.ToString(DecalScale.X) + " " + XmlConvert.ToString(DecalScale.Y));
        }

        protected override void ReadOsd(XmlReader xml, ObjectLoadContext context)
        {
            while (xml.IsStartElement())
            {
                switch (xml.LocalName)
                {
                    case "Class":
                        ClassName = xml.ReadElementContentAsString();
                        break;
                    case "Tag":
                        Tag = xml.ReadElementContentAsString();
                        break;
                    case "Flags":
                        Flags = xml.ReadElementContentAsEnum<ParticleFlags>() & ParticleFlags.NotInitiallyCreated;
                        break;
                    case "DecalScale":
                        DecalScale = xml.ReadElementContentAsVector2();
                        break;
                    default:
                        xml.Skip();
                        break;
                }
            }
        }
    }
}