More webrequest in a text file - c#-4.0

Question

I have this:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace ConsoleApplication2
{
public class Program
{
static void Main(string[] args)
{
//Consider making this configurable
const string sourceFile = "testSolar.txt";
const string pattern = "http://10.123.9.66:80";
Regex re = new Regex("^(http|https)://");
//var res = re.Match(str);
var webClient = new WebClient();
var times = new Dictionary<string, TimeSpan>();
var stopwatch = new System.Diagnostics.Stopwatch();
//Add header so if headers are tracked, it will show it is your application rather than something ambiguous
webClient.Headers.Add(HttpRequestHeader.UserAgent, "Response-Tester-Client");
var urlList = new List<string>();
//Loop through the lines in the file to get the urls
try
{
stopwatch.Start();
using (var reader = new StreamReader(sourceFile))
{
while (!reader.EndOfStream)
{
var urNewList = new List<string>();
var line = reader.ReadLine();
//line = line.Substring(line.IndexOf(pattern));
//line.Split("\t");
var columns = line.Split('\t');
if (columns[2] == "R")
{
var url = columns[4] + "?" + columns[5];
urlList.Add(url);
}
}
}
}
catch (Exception e)
{
Console.WriteLine("An error occured while attempting to access the source file at {0}", sourceFile);
}
finally
{
//Stop, record and reset the stopwatch
stopwatch.Stop();
times.Add("FileReadTime", stopwatch.Elapsed);
stopwatch.Reset();
}
//Try to connect to each url
var counter = 1;
foreach (var url in urlList)
{
try
{
stopwatch.Start();
webClient.DownloadString(url);
}
catch (Exception e)
{
Console.WriteLine("An error occured while attempting to connect to {0}", url);
}
finally
{
stopwatch.Stop();
//We use the counter for a friendlier url as the current ones are unwieldly
times.Add("Url " + counter, stopwatch.Elapsed);
counter++;
stopwatch.Reset();
}
}
//Release the resources for the WebClient
webClient.Dispose();
//Write the response times
foreach (var key in times.Keys)
{
Console.WriteLine("{0}: {1}", key, times[key].TotalSeconds);
}
Console.ReadKey();
}
}
}
And I have three lines in a text file, like this:
2014-08-25 14:20:43,949 DEV belkbyavlahok0jrvoutn2xd 21 R O http://10.123.9.66:80/solr_3.6/wiewaswie_live/select/ qt=standard_a2aperson&q=*:*&fq=(nosyn_name_last_exact:(qxqroelofqxq))&fq=(nosyn_name_patronym_exact:(qxqharmsqxq))&spellcheck.q=(qxqroelofqxq qxqharmsqxq)&fq={!tag%3Dalldoctypes}doc_type:1&fq=date_main:[0 TO 18133112]&facet.query={!ex%3Dalldoctypes}doc_type:3 AND (b_public:1)&facet.query={!ex%3Dalldoctypes}doc_type:2 AND (b_public:1)&spellcheck=true&spellcheck.count=-3&start=0&sort=name_last asc, score desc&omitHeader=true
2014-08-25 14:20:45,478 DEV z5gyjtcexs41vra4yegqejcf 0 R . http://10.123.9.66:80/solr_3.6/combi_live/select/ qt=standard_a2aperson&q=(((((nosyn_name_last_b_exact:(qxqkuilenburgqxq))))))&fq=(nosyn_name_last_exact:(qxqbroekqxq))&spellcheck.q=(qxqbroekqxq kuilenburg)&fq=(fk_collectiontype:6)&spellcheck=true&spellcheck.count=-3&start=10&sort=date_main asc, score desc&omitHeader=true
2014-08-25 14:20:45,930 DEV hmb0uqzc10s0ounwdhpwmflp 1 R O http://10.123.9.66:80/solr_3.6/combi_live/select/ qt=standard_a2aperson&q=(((((nosyn_name_last_b_exact:(qxqkruijsqxq))))))&fq=(nosyn_name_first_exact:(qxqw*qxq))&fq=(nosyn_name_last_exact:(qxqtreurenqxq))&spellcheck.q=(qxqw*qxq qxqtreurenqxq kruijs)&spellcheck=true&spellcheck.count=-3&start=0&sort=date_main asc, score desc&omitHeader=true
But if I just have 1 line, like this:
2014-08-25 14:20:45,930 DEV hmb0uqzc10s0ounwdhpwmflp 1 R O http://10.123.9.66:80/solr_3.6/combi_live/select/ qt=standard_a2aperson&q=(((((nosyn_name_last_b_exact:(qxqkruijsqxq))))))&fq=(nosyn_name_first_exact:(qxqw*qxq))&fq=(nosyn_name_last_exact:(qxqtreurenqxq))&spellcheck.q=(qxqw*qxq qxqtreurenqxq kruijs)&spellcheck=true&spellcheck.count=-3&start=0&sort=date_main asc, score desc&omitHeader=true
then it works, but if I have more then I get an
The remote server returned an error: (404) Not Found.
Thank you for you help