Union multiple number of lists in C#

Question

I am looking for a elegant solution for the following situation:

I have a class that contains a List like

class MyClass{ 
...
 public List

        

Answer 1

You should have a look at SelectMany. Something like this should generate your "flat" list:

MyClassList.SelectMany(b => b.SomeOtherClasses)

It will return a IEnumerable which you can filter/process further.