private void WriteFile(String FileName , String data ){
            if (File.Exists(FileName)) {File.Delete(FileName);}
            StreamWriter swFile   = File.CreateText(FileName);
            swFile.Write(data);
            swFile.Flush();
            swFile.Close();
        }
 
        private String ReadFile(String FileName ) {
            String ret  = "";
            if (File.Exists(FileName)){
                 System.IO.StreamReader TheFile = new System.IO.StreamReader(FileName, System.Text.Encoding.Default);
                 ret = TheFile.ReadToEnd();
                 TheFile.Close();
            }
            return ret;
        }