How to clear Query string value in asp.net

PropertyInfo isreadonly = typeof(System.Collections.Specialized.NameValueCollection).GetProperty("IsReadOnly", BindingFlags.Instance | BindingFlags.NonPublic);
                // make collection editable
                isreadonly.SetValue(this.Request.QueryString, false, null);
                // remove
                this.Request.QueryString.Remove("id");

http://www.codeproject.com/Questions/310625/How-to-clear-Query-string-value-in-net