[Mono-dev] serialization "not implemented"

[SillySnail]

Hi

My program needs to serialize a bunch of user-defined instances time to 
time. It runs correctly with .NET framework on Windows but throws 
exception with latest mono-2.8 on Linux. The exception is thrown when 
the program tries to write (serialize) an instance to disk, and says 
"The requested feature is not implemented". Detailed error info is at 
last of the mail.

I've checked the program with the latest Mono Migration Analyzer and it 
reports all feature in my program are supported in mono. I guess the 
problem is in the way I work with mono rather than mono itself. Does 
anyone knows how to fix the problem? Thanks very much.



Exception thrown:

System.NotImplementedException: The requested feature is not implemented.
   at System.Collections.Generic.HashSet`1[System.Int64].GetObjectData 
(System.Runtime.Serialization.SerializationInfo info, StreamingContext 
context) [0x00000] in <filename unknown>:0
   at 
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.GetObjectData (System.Object 
obj, System.Runtime.Serialization.Formatters.Binary.TypeMetadata& 
metadata, System.Object& data) [0x00000] in <filename unknown>:0
   at 
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObject 
(System.IO.BinaryWriter writer, Int64 id, System.Object obj) [0x00000] 
in <filename unknown>:0
   at 
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObjectInstance 
(System.IO.BinaryWriter writer, System.Object obj, Boolean 
isValueObject) [0x00000] in <filename unknown>:0
   at 
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteQueuedObjects 
(System.IO.BinaryWriter writer) [0x00000] in <filename unknown>:0
   at 
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObjectGraph 
(System.IO.BinaryWriter writer, System.Object obj, 
System.Runtime.Remoting.Messaging.Header[] headers) [0x00000] in 
<filename unknown>:0
   at 
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize 
(System.IO.Stream serializationStream, System.Object graph, 
System.Runtime.Remoting.Messaging.Header[] headers) [0x00000] in 
<filename unknown>:0
   at 
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize 
(System.IO.Stream serializationStream, System.Object graph) [0x00000] in 
<filename unknown>:0