Cluj München 1140km

Here is how to create and use temporary files with C # (don't forget the try catch finalize):

                       string fileName = Path.GetTempFileName();
                        fileName = fileName.Replace(".tmp", ".rdp");

                        FileStream fileStream = null;
                        StreamWriter fileWriter = null;

                        fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write);
                        fileWriter = new StreamWriter(fileStream);
                         ...
                        fileWriter.Flush();
                        fileWriter.Close();