System.InvalidOperationException: 生成 XML 文件時出錯。 ---> System.InvalidOperationException: CProxyTypeSpace_EntityRoleEntity_NHibernate_ProxyINHibernateProxy_System_Runtime_SerializationISerializable2 無法序列化，因為它沒有無引數的建構函式。
   在 System.Xml.Serialization.TypeDesc.CheckSupported()
   在 System.Xml.Serialization.TypeScope.GetTypeDesc(Type type, MemberInfo source, Boolean directReference, Boolean throwOnError)
   在 System.Xml.Serialization.XmlSerializationWriter.CreateUnknownTypeException(Type type)
   在 System.Xml.Serialization.XmlSerializationWriter.WriteTypedPrimitive(String name, String ns, Object o, Boolean xsiType)
   在 Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write1_Object(String n, String ns, Object o, Boolean isNullable, Boolean needType)
   在 Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write6_ArrayOfAnyType(Object o)
   在 Microsoft.Xml.Serialization.GeneratedAssembly.ArrayListSerializer.Serialize(Object objectToSerialize, XmlSerializationWriter writer)
   在 System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
   --- 內部異常堆疊跟蹤的結尾 ---
   在 System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
   在 System.Xml.Serialization.XmlSerializer.Serialize(TextWriter textWriter, Object o)
   在 System.Web.Services.Protocols.XmlReturnWriter.Write(HttpResponse response, Stream outputStream, Object returnValue)
   在 System.Web.Services.Protocols.HttpServerProtocol.WriteReturns(Object[] returnValues, Stream outputStream)
   在 System.Web.Services.Protocols.WebServiceHandler.WriteReturns(Object[] returnValues)
   在 System.Web.Services.Protocols.WebServiceHandler.Invoke()