How to execute JSON and XML data for Windows Phone 8

string authKey = IsolatedStorageSettings.ApplicationSettings["authKey"] as string;

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("web service url");
request.ContentType = "application/x-www-form-urlencoded";
request.Method = "POST";

using (var requestStream = await request.GetRequestStreamAsync())
{
byte[] buffer = Encoding.UTF8.GetBytes("authKey=" + authKey + "&latitude=" + geoposition.Coordinate.Latitude.ToString() + "&longitude=" + geoposition.Coordinate.Longitude.ToString() + "&timeInterval=" + Minutes + "&time=" + updatetime + "&profileStatus=true");
await requestStream.WriteAsync(buffer, 0, buffer.Length);
}


HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync();

using (var reader = new StreamReader(response.GetResponseStream()))
{
string result = await reader.ReadToEndAsync();
}

XML Document Execution using Restsharp.

var client = new RestClient("Web service url/");

           string url = string.Format("MobileApp/api/JobSeeker/Interview/SessionID/{0}/lng/{1}", sessionID,language);

           var request = new RestRequest(url, Method.GET);

           request.AddParameter("Authorization-Token", "ZJ6/3tldwf1gHj6uMUVSgQ==", ParameterType.HttpHeader);

           client.ExecuteAsync(request, response =>
           {
               InterviewResponse(response.Content);
           });

 private void InterviewResponse(string xmlString)
        {

            XDocument x = XDocument.Parse(xmlString);

            var collections = x.Root.Elements().ToList();
     
            List<interviews> listofJobs = new List<interviews>();

            foreach (var item in collections)
            {
                Interviews job = new Interviews();

                foreach (var el in item.Elements())
                {
                    switch (el.Name.LocalName)
                    {
                        case "EmployerName":
                            job.EmployerName = el.Value;
                            break;
                        case "InterviewType":
                            job.InterviewType = el.Value;
                            break;
                        case "JobCode":
                            job.JobCode = el.Value;
                            break;
                        case "JobTitle":
                            job.JobTitle = el.Value;
                            break;
                        case "Location":
                            job.Location = el.Value;
                            break;
                        case "Schedule":
                            job.Schedule = el.Value;
                            break;
                    }
                }

                listofJobs.Add(job);
            }
           
        }


</interviews></interviews>

HttpWebRequest listRequest = (HttpWebRequest)HttpWebRequest.Create("web service url");
listRequest.Method = "GET";
listRequest.Accept = "application/atom+xml";
listRequest.ContentType = "application/atom+xml;type=entry";
//listRequest.Credentials = cred;
HttpWebResponse listResponse = (HttpWebResponse)listRequest.GetResponse();
StreamReader listReader = new StreamReader(listResponse.GetResponseStream());
var listXml = new XmlDocument();
listXml.LoadXml(listReader.ReadToEnd());

XmlNodeList xnList = listXml.SelectNodes("/servicelist/service");

//Method 1 Seperate node list
foreach (XmlNode title in xnList)
{
servicelist.Add(new NagiosServices { host_name = title["host_name"].InnerText, display_name = title["display_name"].InnerText, is_active = title["is_active"].InnerText == "1" ? "UP" : "DOWN" });
}