LoginMessage Seafight

public class LoginMessage : IModule
    {
        public double UserId;
        [CompilerGenerated]
        private static Func<byte[], IEnumerable<byte>> func_0;
        private int _version;
        public static int Id = -25981;
        public string SessionId = "";

        public LoginMessage(double UID = 0.0, string SID = "")
        {
            this.UserId = UID;
            this.SessionId = SID;
        }

        [CompilerGenerated]
        private static IEnumerable<byte> smethod_0(byte[] byte_0)
        {
            return byte_0;
        }

        public override int getId()
        {
            return 15540;
        }

        public override int getVersion()
        {
            return 0;
        }

        public override int getRemoteVersion()
        {
            return this._version;
        }

        public override int getEstimatedLength()
        {
            return 10;
        }

        public override void read(IDataInput param1)
        {
            this._version = param1.readShort();
            this._version = 65535 & ((65535 & this._version) << 3 % 16 | (65535 & this._version) >> 16 - 3 % 16);
            this._version = (this._version > 32767) ? (this._version - 65536) : this._version;

            this.UserId = param1.readDouble();
            this.SessionId = param1.readUTF();
        }

        public override byte[] write()
        {
            if (func_0 == null)
            {
                func_0 = new Func<byte[], IEnumerable<byte>>(LoginMessage.smethod_0);
            }
            return new List<byte[]> { IDataOutput.WriteShort(15540), IDataOutput.WriteShort(65535 & ((65535 & 0) >> 3 % 16 | (65535 & 0) << 16 - 3 % 16)), IDataOutput.WriteString(this.SessionId), IDataOutput.writeDouble(this.UserId) }.SelectMany<byte[], byte>(func_0).ToArray<byte>();
        }
    }