c# - How merge two lists of different objects?

Question

Using C# with LINQ, how can I merge two lists of different objects, say, Seminar and Conference? They have some common and some different fields/properties and do not share unique id.

class Seminar
{
   int id,
   DateTime joinDate,
   string name
}

class Conference
{
   Guid confNumber,
   DateTime joinDate
   Type type
}

I have a list of:

List<Seminar>
List<Conference>

I need to merge them into a super List:

List<Object>

A code snippet would be great help.

Answer 1

If you just want a single List<object> containing all objects from both lists, that's fairly simple:

List<object> objectList = seminarList.Cast<object>()
    .Concat(conferenceList)
    .ToList();

If that's not what you want, then you'll need to define what you mean by "merge".