Logging only specific calls with the .NET SDK for Trading API

using  System;
using System.IO;
using eBay.Service.Call;
using eBay.Service.Util;
using eBay.Service.Core.Sdk;
using eBay.Service.Core.Soap;

private void GeteBayOfficialTime()
{

     ApiContext context = new ApiContext();
     context.ApiCredential.eBayToken = "Your Token";
     
     //Server URL for Sandbox
     context.SoapApiServerUrl = "https://api.sandbox.ebay.com/wsapi";
     //For production, the url is https://api.ebay.com/wsapi"

     GeteBayOfficialTimeCall call = new GeteBayOfficialTimeCall(context);
     call.Execute();
     FileStream fileStream = null;
     StreamWriter writer = null;
     string fileName = "log.txt";
     fileStream = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write);

     writer = new StreamWriter(fileStream);
     writer.BaseStream.Seek(0, SeekOrigin.End);
     //log request
     writer.WriteLine(call.SoapRequest + "\r\n");
     writer.Flush();
     //log response
     writer.WriteLine(call.SoapResponse);
     writer.Flush();
     writer.Close();
}