I'm looking to implement the Observer pattern in VB.NET or C# or some other first-class .NET language. I've heard that delegates can be used for this, but can't figure out why they would be preferred over plain old interfaces implemented on observers. So,
- Why should I use delegates instead of defining my own interfaces and passing around references to objects implementing them?
- Why might I want to avoid using delegates, and go with good ol'-fashioned interfaces?
