Retrieve inner element from SOAP response in C#

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C#

SOAP

I require a specific element from my SOAP POST request's response. My actual request is done using HTTP Client and this works perfectly. I have been trying to pull an inner element from this response to utilize in my application but I haven't found a way to. This is my first time using SOAP requests so any help will be appreciated.

The below is my response from PostMan: I need to retrieve the value of "CustomerName"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <soap:Body>
        <Query_With_StringResponse xmlns="http://www.syspro.com/ns/query/">
            <Query_With_StringResult><?xml version="1.0" encoding="Windows-1252"?>
<ARListOfCustomers Language='05' Language2='EN' CssStyle='' DecFormat='1' DateFormat='01' Role='01' Version='7.0.005' OperatorPrimaryRole='   '   >
<QueryOptions>
<ReportSequence>CU</ReportSequence>
<PriceCode/>
<PriceProductmatrix>N</PriceProductmatrix>
<ExtraFields>N</ExtraFields>
<InterestExemptionStatusSelection>A</InterestExemptionStatusSelection>
<TaxExemptionSelection>A</TaxExemptionSelection>
<CustomerSelectionFilterType>A</CustomerSelectionFilterType>
<CustomerSelectionFilterValue/>
<CustomerClassSelectionFilterType>A</CustomerClassSelectionFilterType>
<CustomerClassSelectionFilterValue/>
<GeographicAreaSelectionFilterType>A</GeographicAreaSelectionFilterType>
<GeographicAreaSelectionFilterValue/>
<BranchSelectionFilterType>A</BranchSelectionFilterType>
<BranchSelectionFilterValue/>
<SalespersonSelectionFilterType>A</SalespersonSelectionFilterType>
<SalespersonSelectionFilterValue/>
<LineDiscountCodeSelectionFilterType>A</LineDiscountCodeSelectionFilterType>
<LineDiscountCodeSelectionFilterValue/>
<TermsSelectionFilterType>A</TermsSelectionFilterType>
<TermsSelectionFilterValue/>
<ProductCategorySelectionFilterType>A</ProductCategorySelectionFilterType>
<ProductCategorySelectionFilterValue/>
<InvoiceDiscountCodeSelectionFilterType>A</InvoiceDiscountCodeSelectionFilterType>
<InvoiceDiscountCodeSelectionFilterValue/>
<CurrencySelectionFilterType>A</CurrencySelectionFilterType>
<CurrencySelectionFilterValue/>
<CreditLimitSelectionFilterType>A</CreditLimitSelectionFilterType>
<CreditLimitSelectionFilterValue/>
</QueryOptions>
<Customer>
<CustomerListHeader>
<Customer>TSAR</Customer>
<CustomerName>TSAR BUSINESS SOLUTION</CustomerName>
<CustomerShortName>TSAR BUSINESS SOLUTI</CustomerShortName>
<Branch>TSAR</Branch>
<BranchDescription>HEAD OFFICE  TSAR</BranchDescription>
<Geography>031</Geography>
<GeographyDescription>DURBAN</GeographyDescription>
<Class/>
<ClassDescription>** Not on file **</ClassDescription>
<BalanceType>Op-item</BalanceType>
<Sales>IVAN</Sales>
<CreditLimit>           0</CreditLimit>
<Currency>R</Currency>
<CurrencyDescription>Rand</CurrencyDescription>
<Telephone/>
<InvoiceTermsCode>CO</InvoiceTermsCode>
<TermsCodeDescription>CASH ON DELIVERY</TermsCodeDescription>
</CustomerListHeader>
<CustomerListDetails>
<Contact/>
<TaxNo>Tax No:</TaxNo>
<SpecialInstructions/>
<SoldToAddress1/>
<SoldToAddress2/>
<SoldToAddress3/>
<SoldToAddress3Loc/>
<SoldToAddress4/>
<SoldToAddress5/>
<SoldToAddress6/>
<SoldToGpsLat>  0.000000</SoldToGpsLat>
<SoldToGpsLong>   0.000000</SoldToGpsLong>
<ShipToAddress1>STRAUSS DALY</ShipToAddress1>
<ShipToAddress2>41 RICHFONT CRICLE</ShipToAddress2>
<ShipToAddress3>DURBAN</ShipToAddress3>
<ShipToAddress3Loc/>
<ShipToAddress4>KZB</ShipToAddress4>
<ShipToAddress5>SOUTH AFRICA</ShipToAddress5>
<ShipToAddress6>4000</ShipToAddress6>
<ShipToGpsLat>  0.000000</ShipToGpsLat>
<ShipToGpsLong>   0.000000</ShipToGpsLong>
<GSTNumber/>
<LineDiscCode/>
<InvDiscCode/>
<DefaultPriceCode/>
<CompanyTaxNumber/>
<ExemptFinChg>No finance charges</ExemptFinChg>
</CustomerListDetails>
</Customer>
<ReportSummary>
<NoOfCustomersListed>    1</NoOfCustomersListed>
</ReportSummary>
</ARListOfCustomers>
 </Query_With_StringResult>
        </Query_With_StringResponse>
    </soap:Body>
</soap:Envelope>

What I have tried:

My code in c#

public async Task<string> CreateSoapEnvelop()
        {
            string soapString = @"<?xml version=""1.0"" encoding=""utf-8""?>
            <soap:Envelope xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:soap=""http://schemas.xmlsoap.org/soap/envelope/"">
                <soap:Body>
                 <Query_With_String xmlns=""http://www.syspro.com/ns/query/"">
                <UserId>" + Settings.GUID + @"</UserId>
                <BusinessObject></BusinessObject>
                <XMLIn></XMLIn>
                </Query_With_String>
                </soap:Body>
            </soap:Envelope>";

            HttpResponseMessage response = await PostXmlRequest("http://sysprowebservices/query.asmx", soapString);
            var soapResponse = await response.Content.ReadAsStringAsync();

            XmlDocument doc = new XmlDocument();
            doc.LoadXml(soapResponse);
            XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
            nsmgr.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/");
            nsmgr.AddNamespace("ab", "http://www.syspro.com/ns/query/");
            nsmgr.AddNamespace("bg", " https://bixg.choicepoint.com/webservices/3.0");
            nsmgr.AddNamespace("xsd", "http://www.w3.org/2001/XMLSchema");
            nsmgr.AddNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");

            XmlNode xmlnode = doc.DocumentElement.SelectSingleNode("/soap:Envelope/soap:Body/ab:Query_With_StringResponse/ab:Query_With_StringResult", nsmgr);
            //String contractId = node2.SelectSingleNode("ContractID").InnerXml;
            string customer = xmlnode.SelectSingleNode("Customer").InnerXml;

            return "";
        }

        public static async Task<HttpResponseMessage> PostXmlRequest(string baseUrl, string xmlString)
        {
            using (var httpClient = new HttpClient())
            {
                var httpContent = new StringContent(xmlString, Encoding.UTF8, "text/xml");
                httpContent.Headers.Add("SOAPAction", "http://www.syspro.com/ns/query/Query_With_String");

                return await httpClient.PostAsync(baseUrl, httpContent);
            }
        }