System.Data.SqlClient.TdsParser.TryProcessColumnHeaderNoNBC C# (CSharp) Method

        private bool TryProcessColumnHeaderNoNBC(SqlMetaDataPriv col, TdsParserStateObject stateObj, out bool isNull, out ulong length)
        {
            if (col.metaType.IsLong && !col.metaType.IsPlp)
            {
                //
                // we don't care about TextPtrs, simply go after the data after it
                //
                byte textPtrLen;
                if (!stateObj.TryReadByte(out textPtrLen))
                {
                    isNull = false;
                    length = 0;
                    return false;
                }

                if (0 != textPtrLen)
                {
                    // read past text pointer
                    if (!stateObj.TrySkipBytes(textPtrLen))
                    {
                        isNull = false;
                        length = 0;
                        return false;
                    }

                    // read past timestamp
                    if (!stateObj.TrySkipBytes(TdsEnums.TEXT_TIME_STAMP_LEN))
                    {
                        isNull = false;
                        length = 0;
                        return false;
                    }

                    isNull = false;
                    return TryGetDataLength(col, stateObj, out length);
                }
                else
                {
                    isNull = true;
                    length = 0;
                    return true;
                }
            }
            else
            {
                // non-blob columns
                ulong longlen;
                if (!TryGetDataLength(col, stateObj, out longlen))
                {
                    isNull = false;
                    length = 0;
                    return false;
                }
                isNull = IsNull(col.metaType, longlen);
                length = (isNull ? 0 : longlen);
                return true;
            }
        }