wcf - DataContract Serialization gives "Index was outside the bounds of the array" exception ..C# -

i tried serialize large tree data structure in c# using datacontract serializer. got cyclic reference exception. marked [datacontract(isreference = true)] instead of [datacontract] against classes wherever required. "index outside bounds of array" exception. code follows:

    public void serialize(object obj, string file, type t)     {          using (filestream stream1 = new filestream(file, filemode.create))         {             stream1.position = 0;             datacontractserializer s = new datacontractserializer(t);              s.writeobject(stream1, obj);         }       } 

the above code works other serializations . in case of serializing tree object, not work. have marked [datacontract(isreference = true)] against required classes , [datamember] against required attributes.please help

i want suggest mark inherited classes datacontract(isreference = true) attribute. said done this. so, check again marks, , ensure of inherited classes marked. if inherited classes marked still error, check project wcf tracing.

tracing show happens during serialization process details.

you can find more details on msdn.