How to read soap response using C#?

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C#

ASP.NET

Soap response as:

<?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>
    <TASIntegrationRequestResponse xmlns="http://tempuri.org/">
      <TASIntegrationRequestResult>
        <status>true</status>
        <resMsg>Profile integrated to TAS.</resMsg>
      </TASIntegrationRequestResult>
    </TASIntegrationRequestResponse>
  </soap:Body>
</soap:Envelope>

What I have tried:

I'm trying to read it as:

XmlNamespaceManager xmlnsManager = new System.Xml.XmlNamespaceManager(xmlDoc.NameTable);

xmlnsManager.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/");
xmlnsManager.AddNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
xmlnsManager.AddNamespace("xsd", "http://www.w3.org/2001/XMLSchema");
xmlnsManager.AddNamespace("si", "http://tempuri.org/");

// You'd access the full path like this
XmlNode node = xmlDoc.SelectSingleNode("/soap:Envelope/soap:Body/
si:TASIntegrationRequestResponse/si:TASIntegrationRequestResult/si.status", xmlnsManager);
string strstatus = node.InnerText;

But it's getting exception and it is not reading the status values.
Please help me.