public abstract class CorporateActionProcessBase : ObjectData, IHasID{}

public interface IHasID: IHasParentID
{
        Guid Id { get; }
}

public class CorporateActionProcessStat : CorporateActionProcessBase {}

[KnownType(typeof(CorporateActionProcessStat))]
public class ObjectData 

                if (null != dbSet && typeof(ObjectData).IsAssignableFrom(Type.GetType(typeName, true))
                                  && typeof(IHasID).IsAssignableFrom(Type.GetType(typeName, true)))
                {
                    IQueryable<IHasID> data = dbSet as IQueryable<IHasID>;
                    var dataN = data.Where(w => w.Id == id);
                    var res = dataN as IEnumerable<ObjectData>;

                    return res;
                }

List<ObjectData> list = new List<ObjectData>();
                    var dataN = data.Where(w => w.Id == id);
                    foreach (var item in dataN.ToList())
                    {
                        list.Add((ObjectData)item);
                    }