c# - encoding iz ascii v utf-8

s spodnjo metodo si s spleta poberem html ki pa ma vse šumnike v ascii codingu. kako bi stran pred urejanjem spremenil v npr. utf-8 al vsaj bolj normalno kodiranje? hvala

public void getWebpage(string address)
        {
            string strResult = "";
           
            WebResponse objResponse;
            WebRequest objRequest = System.Net.HttpWebRequest.Create(address);
            objResponse = objRequest.GetResponse();
            

            using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
            {
                strResult = sr.ReadToEnd();
                sr.Close();
            }

            this.results = strResult;
            
        }