如何在c#中为错误web响应等待并重复web响应？

如何在c#中为错误web响应等待并重复web响应？ 当执行Web响应时，错误获取响应。我想尝试web响应无错误，并用成功的获取响应url继续程序。 我的代码：

---

你是说像这样的

 var success = false;
 while (!success)
 {
    try
                {
                    HttpWebRequest URLp =(HttpWebRequest)WebRequest.Create(url);
                    URLp.Timeout = 190000;
                    URLp.Timeout = 260000;
                    URLp.ReadWriteTimeout = 260000;
                    using (WebResponse MyResponse1 = URLp.GetResponse())
                    {
                        str1 = new StreamReader(MyResponse1.GetResponseStream(), System.Text.Encoding.UTF8);
                        page1 = str1.ReadToEnd();
                        success = true;
                    }
                }
                catch
                {
                    Thread.Sleep(70000);
                }

 }

StreamWriter stw1 = new StreamWriter(Address);
stw1.Write(page1);
stw1.Close();

 var success = false;
 while (!success)
 {
    try
                {
                    HttpWebRequest URLp =(HttpWebRequest)WebRequest.Create(url);
                    URLp.Timeout = 190000;
                    URLp.Timeout = 260000;
                    URLp.ReadWriteTimeout = 260000;
                    using (WebResponse MyResponse1 = URLp.GetResponse())
                    {
                        str1 = new StreamReader(MyResponse1.GetResponseStream(), System.Text.Encoding.UTF8);
                        page1 = str1.ReadToEnd();
                        success = true;
                    }
                }
                catch
                {
                    Thread.Sleep(70000);
                }

 }

StreamWriter stw1 = new StreamWriter(Address);
stw1.Write(page1);
stw1.Close();