How to Call Rest API in ASP.NET

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net;
using System.IO;
using System.Data;
using System.Data.Common;
using Golive_Web.Controller;
namespace Golive.Controller
{
    public class APITEXT
    {
        Database database = new Database("GoliveAPI");
        public DataTable GetAPI()
        {
            DbCommand cmd = database.GetStoredPocCommand("SP_TExt");
            DataTable dtApi = database.ExecuteDataTable(cmd);
            return dtApi;
        }
        public string GetData(String mobileNo, String ID, String APILink)
        {
            try
            {
                string XML = "<AccDtls>" + "<Request>" + "<RequestUUID>Req_" + ID + "</RequestUUID>" + "<ServiceRequestId>AcctInq</ServiceRequestId>" + "<ServiceRequestVersion>10.2</ServiceRequestVersion>" + "<ChannelId>CTS</ChannelId>" + "<AccID>" + mobileNo + "</AccID> " + "</Request>" + "</AccDtls>";
                const string url = "http://100.98.2.208:6070/rbl/CTSFin";
                HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);
                request.ContentType = "application/xml"; //set the content type to JSON
                request.Method = "POST"; //make an HTTP POST
                #
                region test# endregion
                using(var streamWriter = new StreamWriter(request.GetRequestStream()))
                    {
                        var resToWrite = XML;
                        streamWriter.Write(resToWrite);
                        streamWriter.Flush();
                        streamWriter.Close();
                    }
                    // Get the response.
                WebResponse response = request.GetResponse();
                var streamReader = new StreamReader(response.GetResponseStream());
                string result = streamReader.ReadToEnd();
                return result;
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}