PayloadHeader - TizzyT

            private class PayloadHeader
            {
                private readonly uint value;

                public ushort Length => (ushort)((value >> 20) << 4);
                public uint Channel => 0b000_0000_0000_1111_1111_1111_1111_1111 & value;

                public PayloadHeader(uint length, uint channel)
                {
                    if ((length & 15) > 0) throw new Exception("Length must be a multiple of 16"); else length >>= 4;
                    if (length > 3840) throw new Exception("Length cannot be greater than 61,440");
                    if (channel > 1048575) throw new Exception("Channel cannot be greater than 1,048,575");
                    value = (length << 20) | channel;
                }

                public PayloadHeader(byte[] data)
                {
                    if (data.Length == 4) value = BitConverter.ToUInt32(data, 0);
                    else throw new Exception("PayloadHeader must be 4 bytes in length");
                }

                public byte[] ToArray() => BitConverter.GetBytes(value);
            }