how to solve An exception of type 'System.Xml.XmlException'

Question

Hi,

 An exception of type 'System.Xml.XmlException' occurred in System.Xml.dll but was not handled in user code

 

Using code:

 

HttpWebRequest request = CreateSOAPWebRequest();

XmlDocument SOAPReqBody = new XmlDocument();

//SOAP Body Request

StringBuilder strRequest = new StringBuilder();

strRequest.Append("<?xml version='1.0' encoding='utf-8'?>");

strRequest.Append("<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:v1=\"http://portal.test.com/admin/v1_1\">");

strRequest.Append("<soapenv:Header/>");

strRequest.Append("<soap:Body>");

strRequest.Append("<v1:GetEntityByRoomKeyRequest>");

strRequest.Append("<v1:roomKey>" + constant.Roomkey + "</v1:roomKey");

strRequest.Append("</v1:GetEntityByRoomKeyRequest>");

strRequest.Append("</soap:Body>");

strRequest.Append("</soap:Envelope>");

SOAPReqBody.LoadXml(strRequest.ToString());

 

 

Please help me to solve this error.