Personal.AddressBook.Deserialize C# (CSharp) Method

        public static Personal.AddressBook Deserialize(Stream stream, Personal.AddressBook instance)
        {
            if (instance.List == null)
                instance.List = new List<Personal.Person>();
            while (true)
            {
                int keyByte = stream.ReadByte();
                if (keyByte == -1)
                    break;
                // Optimized reading of known fields with field ID < 16
                switch (keyByte)
                {
                    // Field 1 LengthDelimited
                    case 10:
                        // repeated
                        instance.List.Add(Personal.Person.DeserializeLengthDelimited(stream));
                        continue;
                }

                var key = global::SilentOrbit.ProtocolBuffers.ProtocolParser.ReadKey((byte)keyByte, stream);

                // Reading field ID > 16 and unknown field ID/wire type combinations
                switch (key.Field)
                {
                    case 0:
                        throw new global::SilentOrbit.ProtocolBuffers.ProtocolBufferException("Invalid field id: 0, something went wrong in the stream");
                    default:
                        global::SilentOrbit.ProtocolBuffers.ProtocolParser.SkipKey(stream, key);
                        break;
                }
            }

            return instance;
        }