gistfile1.cs

StreamWriter singlePlayerOutputStream = null;
if (singlePlayer) {
    Console.WriteLine (" midparse singlePlayer OK ");
    // setup an additional file for the singlePlayerAnalytics
    string singlePlayeroutputFileName = fileName + "." + map + "_"+singlePlayerID+".csv";
    singlePlayerOutputStream = new StreamWriter (singlePlayeroutputFileName);
    //And write a header so you know what is what in the resulting file
    singlePlayeroutputStream.WriteLine (GenerateSinglePlayerCSVHeader ());
}