An example message from Legeria.Networking.

NetworkMessageRealmSector.cs

    [NetworkMessageData(0x0005, NetworkMessageTransport.TCP)]
    public class NetworkMessageRealmSector : INetworkMessage
    {
        public SectorPoint SectorPoint;

        public Tile[,] Tiles;

        public void Write(BinaryWriter writer)
        {
            if (this.Tiles == null) throw new Exception("this.Tiles must be initialized with Tile data.");

            writer.Write(this.SectorPoint.PackedValue);
            for (var x = 0; x < TileWorX.SECTOR_TILE_SIZE; x += 1)
            {
                for (var y = 0; y < TileWorX.SECTOR_TILE_SIZE; y += 1)
                {
                    writer.Write(this.Tiles[x, y].BackType.Id);
                    writer.Write(this.Tiles[x, y].BaseType.Id);
                }
            }
        }

        public void Read(BinaryReader reader)
        {
            this.Tiles = new Tile[TileWorX.SECTOR_TILE_SIZE, TileWorX.SECTOR_TILE_SIZE];

            this.SectorPoint = new SectorPoint(reader.ReadUInt16());
            for (var x = 0; x < TileWorX.SECTOR_TILE_SIZE; x += 1)
            {
                for (var y = 0; y < TileWorX.SECTOR_TILE_SIZE; y += 1)
                {
                    this.Tiles[x, y] = new Tile(
                        reader.ReadByte(),  // BackType.Id
                        reader.ReadByte()); // BaseType.Id
                }
            }
        }
    }