BattleNet.CdKey.ConvertToHexDigit C# (CSharp) Method

        protected static char ConvertToHexDigit(ulong byt)
        {
            byt &= 0xF;
            if (byt < 10)
                return (char)(byt + 0x30);
            else
                return (char)(byt + 0x37);
        }