C# - connecting listeners and data through attributes?

Question

C++ / C#

Hello.
(The question may even be about Unity (3d))
I'm looking for something interesting for connecting a delegate / method through an attribute, from Google I did not find how to sign an instance method for execution by an external call. First of all control of instantiation.
More or less like this:

[Handler("SomeEvent", "SomeModel"...)]
public void SomeEventHandler(Event e) {}

[DataInject("SomeDataProvider")]
public ObservableCollection<DataItem> list;

I met such a concept in ActionScript3 (flash), although there the core of the injection engine had to pass the creation of an instance through itself.

[Inject]
public var model:MainModel;