retriving urlfrom the database

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C#

I need to download all the url saved on my Database , I got a code that retrive all the url list from the database , and i also got a code that download the actual page , now i need a code that gona take all this url list download all this pages within a loop this is my code i have that download the string of the pages

string url = "http://www.urlfilterdb.com/files/downloads/ReferenceManual.pdf";
            string strResult = "";
         

            WebResponse objResponse;
            WebRequest objRequest = System.Net.HttpWebRequest.Create(url);

            objResponse = objRequest.GetResponse();



            using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
            {
                strResult = sr.ReadToEnd();
           
                // Close and clean up the StreamReader
                sr.Close();
            }

            // Display results to a webspage
            Response.Write(strResult);
            // save to the databa
            System.IO.File.WriteAllText(@"C:\Users\Nokukhanya\Documents\pages_index\", strResult);