無法序列HttpWebRequest的（類型「System.Net.WebRequest + WebProxyWrapper」未標記爲可序列化。）

Question

Possible Duplicate:
HttpWebRequest Won't Serialize

爲了記錄我試圖序列System.Net的實例一些HTTP流量。 HttpWebRequest的。應用程序使用MVC 3，問題代碼位於控制器類的操作方法中。

在.NET框架4它的類是documented爲可序列：

[SerializableAttribute] 
    public class HttpWebRequest : WebRequest, 
     ISerializable 

以下測試代碼失敗在所指示的語句：

... 
HttpWebRequest preapprovalRequest = (HttpWebRequest)WebRequest.Create("http://big.URL.here"); 
... 
HttpWebResponse preapprovalResponse = (HttpWebResponse)preapprovalRequest.GetResponse(); 


// Serialize the request context. 
IFormatter formatter = new BinaryFormatter(); 
MemoryStream msRequest = new MemoryStream(); 
formatter.Serialize(msRequest, preapprovalRequest); //<<<<< Error here. 
// Reset the stream and deserialize. 
msRequest.Seek(0, SeekOrigin.Begin); 
HttpWebRequest duplicateRequest = (HttpWebRequest)formatter.Deserialize(msRequest); 
msRequest.Close(); 

// Serialize the response context. 
MemoryStream msResponse = new MemoryStream(); 
formatter.Serialize(msResponse, preapprovalResponse); 
// Reset the stream and deserialize. 
msResponse.Seek(0, SeekOrigin.Begin); 
HttpWebResponse duplicateResponse = (HttpWebResponse)formatter.Deserialize(msResponse); 
msResponse.Close(); 

報告的錯誤是：

Type 'System.Net.WebRequest+WebProxyWrapper' in Assembly 
'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' 
is not marked as serializable. 

我試過追逐WebProxyWrapper沒有喜悅。只是一些無益的行李。顯式鑄造的HttpWebRequest的WebRequest的不改變錯誤：

formatter.Serialize(msRequest, (WebRequest)preapprovalRequest); 

在光明的一面，代碼不正確序列化和反序列化HttpWebResponse實例。

我怎麼能失去了包裝？有更好的方法嗎？

Answer 1

來自微軟官方的回答：

Thank you for your feedback. Unfortunately HttpWebRequest dropped support for serialization after .NET 1.1. See http://msdn.microsoft.com/en-us/library/system.net.httpwebrequest.httpwebrequest(v=VS.100).aspx

We’ll see if we can get that attribute removed to avoid this confusion in the future.

他們改變了文檔，包括[ObsoleteAttribute]屬性。

Answer 2

給這一個鏡頭：

[Serializable()] 
public class MyClass 
{ 
    //your serializable class 
}