What url encoding a web browser uses while submitting data to server? with my application i use HttpUtility.UrlEncode(string data) but do not get result as i get with web browser. My application submit some text data to forum. When i am submitting data with web browser (Google Chrome) the exact text i can see submitted to server but when i am submitting using my application it showing some character different. So is this necessary to submit any data to server must be url encoded?