enum Items : byte
{
	DisabledFlag = 1 << 7;
	One = 1;
	Two = 2;
	Three = 5;
}

//=========

[DataMember]
private bool IsDisabled
{
	get { return (CODE & (byte) Items.DisabledFlag) > 0; }
	set
	{
		CODE = value
			? (byte)(CODE | (byte) Items.DisabledFlag)
			: (byte)(CODE & (byte.MaxValue ^ (byte) Items.DisabledFlag));
	}
}

[DataMember]
private byte Code
{
	get { return (byte)(CODE & (byte.MaxValue ^ (byte) Items.DisabledFlag)); }
	set
	{
		CODE = IsDisabled
			? (byte) (value | (byte) Items.DisabledFlag)
			: value;
	}
}