Convert Dataset to Recordset with C#

Web Service in C#, it is easy to operate database with dataset, it is necessary to convert dataset to recordset:

static public ADODB.Recordset ConvertToRecordset(DataTable inTable)
    {
        ADODB.Recordset result = new ADODB.Recordset();
        result.CursorLocation = ADODB.CursorLocationEnum.adUseClient;

        ADODB.Fields resultFields = result.Fields;
        System.Data.DataColumnCollection inColumns = inTable.Columns;

        foreach (DataColumn inColumn in inColumns)
        {
            resultFields.Append(inColumn.ColumnName
                , TranslateType(inColumn.DataType)
                , inColumn.MaxLength
                , inColumn.AllowDBNull ? ADODB.FieldAttributeEnum.adFldIsNullable :
                                         ADODB.FieldAttributeEnum.adFldUnspecified
                , null);
        }

        result.Open(System.Reflection.Missing.Value
                , System.Reflection.Missing.Value
                , ADODB.CursorTypeEnum.adOpenStatic
                , ADODB.LockTypeEnum.adLockOptimistic, 0);

        foreach (DataRow dr in inTable.Rows)
        {
            result.AddNew(System.Reflection.Missing.Value,
                          System.Reflection.Missing.Value);

            for (int columnIndex = 0; columnIndex < inColumns.Count; columnIndex++)
            {
                resultFields[columnIndex].Value = dr[columnIndex];
            }
        }

        return result;
    }

    static ADODB.DataTypeEnum TranslateType(Type columnType)
    {
        switch (columnType.UnderlyingSystemType.ToString())
        {
            case "System.Boolean":
                return ADODB.DataTypeEnum.adBoolean;

            case "System.Byte":
                return ADODB.DataTypeEnum.adUnsignedTinyInt;

            case "System.Char":
                return ADODB.DataTypeEnum.adChar;

            case "System.DateTime":
                return ADODB.DataTypeEnum.adDate;

            case "System.Decimal":
                return ADODB.DataTypeEnum.adCurrency;

            case "System.Double":
                return ADODB.DataTypeEnum.adDouble;

            case "System.Int16":
                return ADODB.DataTypeEnum.adSmallInt;

            case "System.Int32":
                return ADODB.DataTypeEnum.adInteger;

            case "System.Int64":
                return ADODB.DataTypeEnum.adBigInt;

            case "System.SByte":
                return ADODB.DataTypeEnum.adTinyInt;

            case "System.Single":
                return ADODB.DataTypeEnum.adSingle;

            case "System.UInt16":
                return ADODB.DataTypeEnum.adUnsignedSmallInt;

            case "System.UInt32":
                return ADODB.DataTypeEnum.adUnsignedInt;

            case "System.UInt64":
                return ADODB.DataTypeEnum.adUnsignedBigInt;

            case "System.String":
            default:
                return ADODB.DataTypeEnum.adVarChar;
        }
    } 

BTW, using Com interop directly get Recordset and persist  as string and send to client.