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

        internal bool TryProcessAltMetaData(int cColumns, TdsParserStateObject stateObj, out _SqlMetaDataSet metaData)
        {
            Debug.Assert(cColumns > 0, "should have at least 1 column in altMetaData!");

            metaData = null;

            _SqlMetaDataSet altMetaDataSet = new _SqlMetaDataSet(cColumns);
            int[] indexMap = new int[cColumns];

            if (!stateObj.TryReadUInt16(out altMetaDataSet.id))
            {
                return false;
            }

            byte byCols;
            if (!stateObj.TryReadByte(out byCols))
            {
                return false;
            }

            while (byCols > 0)
            {
                if (!stateObj.TrySkipBytes(2))
                { // ignore ColNum ...
                    return false;
                }
                byCols--;
            }

            // pass 1, read the meta data off the wire
            for (int i = 0; i < cColumns; i++)
            {
                // internal meta data class
                _SqlMetaData col = altMetaDataSet[i];

                byte op;
                if (!stateObj.TryReadByte(out op))
                {
                    return false;
                }
                ushort operand;
                if (!stateObj.TryReadUInt16(out operand))
                {
                    return false;
                }

                if (!TryCommonProcessMetaData(stateObj, col))
                {
                    return false;
                }

                indexMap[i] = i;
            }

            altMetaDataSet.indexMap = indexMap;
            altMetaDataSet.visibleColumns = cColumns;

            metaData = altMetaDataSet;
            return true;
        }