Следующее утверждение не работает XML ниже? Я получаю Null Returned. См. XML ниже.
var nodesql = xmlDoc.SelectSingleNode("//CUSTOMERS/CUSTOMER[CODE='AHLENS']");
<?xml version="1.0" encoding="utf-8"?>
<CUSTOMERS>
<CUSTOMER CODE="LABELS" SELECTSQL="select 
	SQUEEZE(PACK_REF),':',
	SQUEEZE(CARTON_NO),':',
	SQUEEZE(TOT_CARTONS),':',
	SQUEEZE(CUST_SHNAME),':',
	SQUEEZE(CUST_SHADDRESS_1),':',
	SQUEEZE(CUST_SHADDRESS_2),':',
	SQUEEZE(CUST_SHADDRESS_3),':',
	SQUEEZE(CUST_SHADDRESS_4),':',
	SQUEEZE(CUST_SHADDRESS_5),':', 
	SQUEEZE(REF_DET),':',
	SQUEEZE(CARTON_SSCC_NUMBER)
	 from ct_generic" LOCATION="D:\Rendez\source_code\C#\CartonLabelPrinting\CartonLabelPrinting\CartonClasses\\LABELS\LABELS.SLD" />
<CUSTOMER CODE="ACKERMANN" SELECTSQL="select 
	SQUEEZE(PACK_REF),':',
	SQUEEZE(CARTON_NO),':',
	SQUEEZE(TOT_CARTONS),':',
	SQUEEZE(CUST_SHNAME),':',
	SQUEEZE(CUST_SHADDRESS_1),':',
	SQUEEZE(CUST_SHADDRESS_2),':',
	SQUEEZE(CUST_SHADDRESS_3),':',
	SQUEEZE(CUST_SHADDRESS_4),':',
	SQUEEZE(CUST_STYLE_NO),':',
	SQUEEZE(CUST_SIZE),':',
	SQUEEZE(CARTON_PCS),':',
	SQUEEZE(REF_DET),':',
	SQUEEZE(BARCODE)
	 from ct_generic" LOCATION="D:\Rendez\source_code\C#\CartonLabelPrinting\CartonLabelPrinting\CartonClasses\\ACKERMANN\ACKERMANN.SLD" />
<CUSTOMER CODE="AHLENS" SELECTSQL="select 
	SQUEEZE(PACK_REF),':',
	SQUEEZE(CARTON_NO),':',
	SQUEEZE(TOT_CARTONS),':',
	SQUEEZE(CUST_SHNAME),':',
	SQUEEZE(CUST_SHADDRESS_1),':',
	SQUEEZE(CUST_SHADDRESS_2),':',
	SQUEEZE(CUST_SHADDRESS_3),':',
	SQUEEZE(CUST_SHADDRESS_4),':',
	SQUEEZE(CARTON_SSCC_NUMBER),':',
	SQUEEZE(CUST_FWD_ADDRESS_1),':',
	SQUEEZE(CUST_FWD_ADDRESS_2),':',
	SQUEEZE(CUST_FWD_ADDRESS_3),':',
	SQUEEZE(CUST_FWD_ADDRESS_4),':',
	SQUEEZE(CARTON_WT),':',
	SQUEEZE(CARTON_PCS),':',
	SQUEEZE(REF_DET),':',
	SQUEEZE(CUST_CODE),':',
	SQUEEZE(CUST_FWD_ADDRESS_5)
	 from ct_generic" LOCATION="D:\Rendez\source_code\C#\CartonLabelPrinting\CartonLabelPrinting\CartonClasses\\AHLENS\AHLENS.SLD" />
<CUSTOMER CODE="AMAZON" SELECTSQL="select 
	SQUEEZE(PACK_REF),',',
	SQUEEZE(CUST_CODE),',',
	SQUEEZE(CARTON_SSCC_NUMBER),',',
	SQUEEZE(CUST_SHNAME),',',
	SQUEEZE(CUST_SHADDRESS_1),',',
	SQUEEZE(CUST_SHADDRESS_2),',',
	SQUEEZE(CUST_SHADDRESS_3),',',
	SQUEEZE(CUST_SHADDRESS_4),',',
	SQUEEZE(CUST_SHADDRESS_5),',',
	SQUEEZE(REF_DET),',',
	SQUEEZE(CARTON_PCS),',',
	SQUEEZE(CARTON_NO),',',
	SQUEEZE(TOT_CARTONS)
	 from ct_generic" LOCATION="D:\Rendez\source_code\C#\CartonLabelPrinting\CartonLabelPrinting\CartonClasses\\AMAZON\AMAZON.SLD" />
</CUSTOMERS>