c# - WCF - Serializing derived classes where base class is base<T> containing fields that are of type <T> -

i have domain objects defined using following pattern...

public abstract class baseobject<idt> {     private idt id = default(idt);     private datetime dtcreatedon;      public idt id     {                 {             return id;         }         set         {             id = value;         }     }      public datetime createdon     {                 {             return this.dtcreatedon;         }         set         {             this.dtcreatedon = value;         }     } }  public class derivedobject : baseobject<int> {     private  string sfield1;       public string field1     {                 {             return this.sfield1;         }         set         {             this.sfield1 = value;         }     }  } 

these domain objects live in .net 2.0 assembly. have .net 4.0 based wcf service needs utilize derived objects in wcf service methods.

the problem base class id field not getting serialized. instance method call

public derivedobject getbyid(int id)     {         //...     } 

returns appropriate derivedobject not have id field.

i have access .net 2.0 code produced domain objects code utilized several other web projects i'd rather not modify unless have to.

anything can in wcf service make sure id field gets serialized? or possible?

thanks -