Thread: String Comparison

I am trying to help a friend of mine with a c# assignment and I can't figure out why when I read in a series of 3 character strings and compare them to predetermined values, that it keeps coming up 0. I haven't done c# in a while and my mind is boggled.

Code:

        private void btnRead_and_Count_Starts_Click(object sender, EventArgs e)
        {
            StreamReader reader = new StreamReader(openFile.FileName);
            int countS = 0;
            int countStop = 0;
            int count = 0;
            string s = "";
            string print = "";
            string print2 = "";
            do
            {
                s = reader.ReadLine();
                switch (s)
                {
                    case "aug":
                        MessageBox.Show("hi");
                        countS++;
                        break;
                    case "gug":
                        countS++;
                        break;
                    case "uug":
                        countS++;
                        break;
                    case "uag":
                        countStop++;
                        break;
                    case "uga":
                        countStop++;
                        break;
                    case "uaa":
                        countStop++;
                        break;
                    default:
                        count++;
                        break;
                }
            }
            while (!reader.EndOfStream);
            reader.Close();
            print = "Start Codons: " + countS;
            print2 = "Stop Codons: " + countStop;
            lstDNA.Items.Add(print);
            lstDNA.Items.Add(print2);
        }
    }

It just refuses to ever count anything for countS and countStop.