No overwriting by streamwriter

Question

//Hello there, these commented lines are not executing. help me out here. when i run 1st time, a file is created. when i run it second time, it dsnt get //overwritten. plz help me out in this....





namespace File_Experiment
{
    class Program
    {
        static void Main(string[] args)
        {
            StreamWriter sw;
            StreamReader sr;
            FileStream fs;
            char c;
            string pth;

            pth = Directory.GetCurrentDirectory();

            Console.WriteLine(pth);

            pth = pth + "\\" + "textfile.txt";

            if ((File.Exists(pth)))
            {
                Console.WriteLine("The file already exists. Append? y or n");
                
               c = Convert.ToChar( Console.Read());
                switch (c)
                {
                    case 'y':
                        
                            FileInfo  fs2;
                            StreamWriter sw2;
                            fs2 = new FileInfo(pth);
                            
                            sw2 = new StreamWriter(pth);
                            Console.WriteLine("Enter the text to be written in the file");
                            string line = "hello chaman";
                            line = Console.ReadLine(); //Why isnt this statement executing??
                            sw2.WriteLine(line); //Why isnt this statement executing??
                            Console.WriteLine("The text has been written");
                            
                            break;
                        
                    case 'n': break;
                    default: Console.WriteLine("No identifiable key inserted. The program will now exit");
                        break;

                }
            }
                else
                {
                    fs = new FileStream(pth, FileMode.Create);
                    sw = new StreamWriter(fs);
                    Console.WriteLine("Enter the text to be written in the file");
                    string line = Console.ReadLine();
                    sw.WriteLine(line);
                    Console.WriteLine("The text has been written");
                    sw.Close(); fs.Close();
                }
                Console.WriteLine("Thanks for using my program :)");
                
            }
            
        }
    }