NetSuite SuiteTalk:具有自定义字段类型的搜索筛选器

我在这个问题上拔头发。我正在尝试使用类型为SearchColumnSelectCustomField的自定义字段筛选已保存的搜索（请参阅下面记录的XML）。

如何正确转换此类型，或者我在这里做错了什么？我不确定我错过了什么，但我最终总是遇到的错误是：

"无法隐式转换类型'NetSuite.com.na1.webservices.SearchColumnSelectCustomField'到"NetSuite.com.na1.webservices.SearchCustomField"

        TransactionSearchAdvanced transSearchAdv = new TransactionSearchAdvanced
        {
            savedSearchScriptId = "customsearch_mycustomsearch"
        };
        SearchColumnSelectCustomField cwoNumField = new SearchColumnSelectCustomField();
        cwoNumField.internalId = "custbody_consolidatedworkorder";
        transSearchAdv.criteria = new TransactionSearch
            {
                basic = new TransactionSearchBasic
                    {
                        //Error Here, on cwoNumField
                    customFieldList = new SearchCustomField[]{ cwoNumField }                                                    
                    }
            };

搜索结果的XML，不添加过滤条件：

                    <tranSales:basic xmlns:platformCommon="urn:common_2014_1.platform.webservices.netsuite.com">
                        <platformCommon:appliedToTransaction>
                            <platformCore:searchValue internalId="442671"/>
                            <platformCore:customLabel>SO #</platformCore:customLabel>
                        </platformCommon:appliedToTransaction>
                        <platformCommon:item>
                            <platformCore:searchValue internalId="315838"/>
                        </platformCommon:item>
                        <platformCommon:quantity>
                            <platformCore:searchValue>11.0</platformCore:searchValue>
                        </platformCommon:quantity>
                        <platformCommon:status>
                            <platformCore:searchValue>pendingBuild</platformCore:searchValue>
                        </platformCommon:status>
                        <platformCommon:transactionNumber>
                            <platformCore:searchValue>204</platformCore:searchValue>
                            <platformCore:customLabel>WO #</platformCore:customLabel>
                        </platformCommon:transactionNumber>
                        <platformCommon:customFieldList>
                            <platformCore:customField xsi:type="platformCore:SearchColumnBooleanCustomField" scriptId="custbody_buildcomplete" internalId="501">
                                <platformCore:searchValue>false</platformCore:searchValue>
                            </platformCore:customField>
                            /*********** field in question here *************/
                            <platformCore:customField xsi:type="platformCore:SearchColumnSelectCustomField" scriptId="custbody_consolidatedworkorder" internalId="500">
                                <platformCore:searchValue typeId="85" internalId="24"/>
                                <platformCore:customLabel>CWO #</platformCore:customLabel>
                            </platformCore:customField>
                        </platformCommon:customFieldList>
                    </tranSales:basic>

    TransactionSearchAdvanced transSearchAdv = new TransactionSearchAdvanced
    {
        savedSearchScriptId = "customsearch_woconsolidationsublist"
    };
    SearchMultiSelectCustomField cwoNumField = new SearchMultiSelectCustomField();
    cwoNumField.scriptId = "custbody_consolidatedworkorder";
    cwoNumField.@operator = SearchMultiSelectFieldOperator.anyOf;
    cwoNumField.operatorSpecified = true;
    cwoNumField.searchValue = new ListOrRecordRef[] { new ListOrRecordRef {internalId = "36"} };
    transSearchAdv.criteria = new TransactionSearch
        {
            basic = new customFieldList = new SearchCustomField[] { cwoNumField }                                          
                }
        };