exception handling example - reads a file and writes contents to the console

ListFile.cs

    class ListFile
    {
        static void Main(string[] args)
        {
            var arg0 = args[0];

            try
            {
                var counter = 0;
                if (args.Length <= 0)
                {
                    Console.WriteLine("Format: ListFile filename");
                    return;
                }

                var fileStream = new FileStream(arg0, FileMode.Open);
                try
                {
                    var streamReader = new StreamReader(fileStream);
                    string line;
                    while ((line = streamReader.ReadLine()) != null)
                    {
                        counter++;
                        Console.WriteLine("{0}: {1}", counter, line);
                    }
                }
                catch (Exception e)
                {
                    Console.WriteLine("Exception during read/write: {0}\n", e);
                }
                finally
                {
                    fileStream.Close();
                }
            }
            catch (FileNotFoundException)
            {
                Console.WriteLine("ListFile could not find the file {0}", arg0);
            }
            catch(Exception e)
            {
                Console.WriteLine("Exception: {0}\n\n,", e);
            }
        }
    }