Default serialization of fields for object lists

Is there any way to have default field values set in the inspector for lists of objects? I noticed default values are set automatically for objects declared individually in MonoBehaviours, but not for lists/arrays. For example:

Code (csharp):

1.  
2. [System.Serializable]
3. public class MyClass
4. {
5.     public string testString = "Hello world";
6. }
7.  
8. // ...
9.  
10. public class MyComponent : MonoBehaviour
11. {
12.     public MyClass testInstance;
13.     public List<MyClass> testList;
14. }
15.  

In the inspector, testString is set to "Hello world" for testInstance but not for elements in testList.

Is there a way to work around Unity serialization to have new list element fields set to defaults, or a default constructor be called?

 

No idea for a proper (better) solution, but all I could think of was this:

Code (csharp):

1.  
2. [ContextMenu("MyAddMethod")]
3.     public void AddItem()
4.     {
5.         testList.Add(new MyClass());
6.     }