How to read soap envelope in c#

Hi guys,

I was given a task to read soap envelope and do some operations on it. Here is how I achieved it      

        [HttpPost]
        [ActionName("CDDService")]
        [Route("api/test/CDDService")]
        public void CDDService()
        {
            var b = RequestBody(HttpContext.Current.Request.InputStream);

            XmlDocument soapEnvelop = new XmlDocument();
            soapEnvelop.LoadXml(b);

            XmlNamespaceManager nsmgr = new XmlNamespaceManager(soapEnvelop.NameTable);
            nsmgr.AddNamespace("soap", "http://www.w3.org/2003/05/soap-envelope");
            nsmgr.AddNamespace("sch", "http://ws.test.com/rti/cdd/schema");
            nsmgr.AddNamespace("wsse", "http://dtest.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");
            nsmgr.AddNamespace("wsu", "http://dtest.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");

            string Username = soapEnvelop.DocumentElement.SelectSingleNode("//wsse:Username",nsmgr).InnerText;
            string password = soapEnvelop.DocumentElement.SelectSingleNode("//wsse:Password",nsmgr).InnerText;

            var cddRequest = soapEnvelop.DocumentElement.SelectSingleNode("//sch:cddRequest",nsmgr);

            string clientCandidateID = cddRequest.Attributes["clientCandidateID"].Value;
            string clientID = cddRequest.Attributes["clientID"].Value;

            string firstname = cddRequest.SelectSingleNode("candidateName/firstName").InnerText;
            string lastname = cddRequest.SelectSingleNode("candidateName/lastName").InnerText;

            string email = cddRequest.SelectSingleNode("webAccountInfo/email").InnerText;

            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.ContentType = "text/xml;charset=utf-8";
            HttpContext.Current.Response.Write(@"<pingResponse><status>Success</status></pingResponse>");
            HttpContext.Current.Response.End();
        }

        private static string RequestBody(Stream InputStream)
        {
            var bodyStream = new StreamReader(InputStream);
            bodyStream.BaseStream.Seek(0, SeekOrigin.Begin);
            var bodyText = bodyStream.ReadToEnd();
            return bodyText;
        }

Hope it helps!