问一个WindowsIdentity的异常问题,求救!!!

Question

画面就抛这样的异常提示信息,这个异常时不时时候产生,搞不清楚,也没DEBUG出哪些代码出错,茫然中...
[NotSupportedException: WindowsIdentity オブジェクトをプロセス間でシリアル化することはできません。]
   System.Security.Principal.WindowsIdentity..ctor(SerializationInfo info, StreamingContext context) +487[TargetInvocationException: 呼び出しのターゲットが例外をスローしました。]
   System.Reflection.RuntimeConstructorInfo.SerializationInvoke(Object target, SerializationInfo info, StreamingContext context) +0
   System.Runtime.Serialization.ObjectManager.CompleteISerializableObject(Object obj, SerializationInfo info, StreamingContext context) +149
   System.Runtime.Serialization.ObjectManager.FixupSpecialObject(ObjectHolder holder) +163
   System.Runtime.Serialization.ObjectManager.DoFixups() +170
   System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, IMethodCallMessage methodCallMessage) +272
   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, IMethodCallMessage methodCallMessage) +183
   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream) +11
   System.Web.Util.AltSerialization.ReadValueFromStream(BinaryReader reader)
   System.Web.SessionState.SessionDictionary.Deserialize(BinaryReader reader)
   System.Web.SessionState.StateClientManager.Deserialize(Stream stream, Int32 lockCookie)
   System.Web.SessionState.SqlStateClientManager.DoGet(String id, SqlCommand cmd)
   System.Web.SessionState.SqlStateClientManager.GetExclusive(String id)
   System.Web.SessionState.StateClientManager.BeginGetExclusiveSync(String id, AsyncCallback cb, Object state)
   System.Web.SessionState.SqlStateClientManager.System.Web.SessionState.IStateClientManager.BeginGetExclusive(String id, AsyncCallback cb, Object state)
   System.Web.SessionState.SessionStateModule.GetSessionStateItem()
   System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData)
   System.Web.AsyncEventExecutionStep.System.Web.HttpApplication+IExecutionStep.Execute()
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)