In C#, the interface can be instantiated?

Question

I\'m reading the code in here. I find that private ITreeModel _model; in TreeList.cs:

namespace Aga.Controls.Tree
{
    public class TreeList: L         


        

Answer 1

Of course you can do this, but underlying object must implement this Interface. So you can do something like

ITreeModel _model  = new TreeModel();

Where

public class TreeModel:ITreeModel
{
  ...
}