Accord.Net löst Nullreferenzausnahme beim Deserialisieren einer Instanz von Codification

Question

Mit Accord.Net versuche ich, eine Instanz der Codifikationsklasse zu serialisieren/deserialisieren, aber eine Nullreferenzausnahme beim Deserialisieren zu erhalten. Ich hatte keine Probleme beim Serialisieren des Objekts. Wenn die Instanz keine Spalten initialisiert hat, wird keine Ausnahme ausgelöst.

System.NullReferenceException was unhandled by user code 
    Message=Object reference not set to an instance of an object. 
    Source=Accord 
    StackTrace: 
     at Accord.Collections.TwoWayDictionary`2.OnDeserialized(StreamingContext context) 
     at System.Runtime.Serialization.SerializationEventHandler.Invoke(StreamingContext context) 
     at System.Runtime.Serialization.ObjectManager.RaiseDeserializationEvent() 
     at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) 
     at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) 
     at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream) 

verwendete ich die Beispieltabelle aus den NaiveBayes

 DataTable table = new DataTable("Mitchell's Tennis Example"); 

     table.Columns.AddRange(new DataColumn[]{ 
      new DataColumn("Day", typeof(string)), 
      new DataColumn("Outlook", typeof(string)), 
      new DataColumn("Temperature", typeof(string)), 
      new DataColumn("Humidity", typeof(string)), 
      new DataColumn("Wind", typeof(string)), 
      new DataColumn("PlayTennis", typeof(string))}); 

     table.Rows.Add("D1", "Sunny", "Hot", "High", "Weak", "No"); 
     table.Rows.Add("D2", "Sunny", "Hot", "High", "Strong", "No"); 
     table.Rows.Add("D3", "Overcast", "Hot", "High", "Weak", "Yes"); 
     table.Rows.Add("D4", "Rain", "Mild", "High", "Weak", "Yes"); 
     table.Rows.Add("D5", "Rain", "Cool", "Normal", "Weak", "Yes"); 
     table.Rows.Add("D6", "Rain", "Cool", "Normal", "Strong", "No"); 
     table.Rows.Add("D7", "Overcast", "Cool", "Normal", "Strong", "Yes"); 
     table.Rows.Add("D8", "Sunny", "Mild", "High", "Weak", "No"); 
     table.Rows.Add("D9", "Sunny", "Cool", "Normal", "Weak", "Yes"); 
     table.Rows.Add("D10", "Rain", "Mild", "Normal", "Weak", "Yes"); 
     table.Rows.Add("D11", "Sunny", "Mild", "Normal", "Strong", "Yes"); 
     table.Rows.Add("D12", "Overcast", "Mild", "High", "Strong", "Yes"); 
     table.Rows.Add("D13", "Overcast", "Hot", "Normal", "Weak", "Yes"); 
     table.Rows.Add("D14", "Rain", "Mild", "High", "Strong", "No"); 


     Codification codebook = new Codification(table); 

     BinaryFormatter bf = new BinaryFormatter(); 
     using (var ms = new MemoryStream()) 
     { 
      bf.Serialize(ms, codebook); 
      ms.Seek(0, SeekOrigin.Begin); 
      object test = bf.Deserialize(ms); //Exception thrown here 
     } 

Answer 1

Dieser Code zu testen, läuft gut für mich - sieht aus wie the problem was fixed in 3.3.0