How merge two lists of different objects?

c#, linq

Solution

Following code works fine for me, if this is your definition of Merge

One solution

List<A> someAs = new List<A>() { new A(), new A() };
List<B> someBs = new List<B>() { new B(), new B { something = new A() } };

List<Object> allS = (from x in someAs select (Object)x).ToList();
allS.AddRange((from x in someBs select (Object)x).ToList());

Where A and B are some classes as follows

class A
{
    public string someAnotherThing { get; set; }
}
class B
{
    public A something { get; set; }
}

Another Solution

List<A> someAs = new List<A>() { new A(), new A() };
List<B> someBs = new List<B>() { new B(), new B { something = string.Empty } };

List<Object> allS = (from x in someAs select (Object)new { someAnotherThing = x.someAnotherThing, something = string.Empty }).ToList();
allS.AddRange((from x in someBs select (Object)new { someAnotherThing = string.Empty, something = x.something}).ToList());

Where A and B are having class definition as

class A
{
    public string someAnotherThing { get; set; }
}
class B
{
    public string something { get; set; }
}

Problem

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.

Original source