C# Multithreading Question

Hi ALl,

Here is my basis of completion:

1). run through text file filled with servers.
2). Connect to each server and check for shares
3). Use 10 threads to run through the list. I know 10 is an arbitrary number, but it was one I picked based on the # of servers I have.

When I run the code for the same share one of three results occur:

I will get the correct output
I will get duplicate output
I will get no output

It changes each time I run the code, so I am assuming that at least two threads are accessing the same variable at the sametime, just not sure how to get this fixed outside of using the lock() function. I read a bunch of C# Multithreading How-to's but for some reason its not happening for my code. Below is the code I am using:

public class ShareCheck
    {
        static string share;
        static void Main(string[] args)
        {
            String server = "";
            share = args[0];

            StreamReader file = new StreamReader("servers.txt");

            int n = 0;
            while ((server = file.ReadLine()) != null)
            {
                if (n == 0)
                {
                    Thread a = new Thread(() => CheckShare(server));
                    a.Start();
                }
                else if (n == 1)
                {
                    Thread b = new Thread(() => CheckShare(server));
                    b.Start();
                }
                else if (n == 2)
                {
                    Thread c = new Thread(() => CheckShare(server));
                    c.Start();
                }
                else if (n == 3)
                {
                    Thread d = new Thread(() => CheckShare(server));
                    d.Start();
                }
                else if (n == 4)
                {
                    Thread e = new Thread(() => CheckShare(server));
                    e.Start();
                }
                else if (n == 5)
                {
                    Thread f = new Thread(() => CheckShare(server));
                    f.Start();
                }
                else if (n == 6)
                {
                    Thread g = new Thread(() => CheckShare(server));
                    g.Start();
                }
                else if (n == 7)
                {
                    Thread h = new Thread(() => CheckShare(server));
                    h.Start();
                }
                else if (n == 8)
                {
                    Thread i = new Thread(() => CheckShare(server));
                    i.Start();
                }
                else if (n == 9)
                {
                    Thread j = new Thread(() => CheckShare(server));
                    j.Start();
                    n = 0;
                }
                else
                    n++;

            }
        }

        static void CheckShare(String server)
        {
            Process p = new Process();
            p.StartInfo.FileName = "share.exe";
            p.StartInfo.Arguments = "\\\\" + server + "\\" + share + "$";
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardOutput = true;
            p.Start();

            lock (server)
            {
                p.WaitForExit();
                if (p.StandardOutput.ReadToEnd().IndexOf("completed successfully") > -1)
                {
                    Console.WriteLine("\\\\" + server + "\\" + share + "$");
                }
            }
            server = "";
        }

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