Why does TreeNodeCollection not implenent IEnumerable<TreeNode>?

TreeNodeCollection, like some of the other control collections in System.Windows.Forms, implements IEnumerable. Is there any design reason behind this or is it just a hangover from the days before generics?

From stackoverflow Sean Kearon

• Yes, Windows Forms dates back to before generics in .Net

  From Luke Halliwell

• Yes, there are many .NET Framework collection, that does not implement generic IEnumerable.

  I think that's because after 2.0 there was no (at least not so match) development of the core part of FW.

  Meanwhile I suggest you to make use of following workaround:

  using System.Link; 
  ... 
  var nodes = GetTreeNodeCollection().OfType<TreeNode>();
  

  From Artem Tikhomirov