IModel

It might be nice if the user was allowed to inherit their model from an `IModel` interface that looked something like this:
```csharp
interface IModel
{
int/Guid Id { get; set;}
}
```

This would allow the code not to have to use the `Type.GetProperty()` method and provide more IntelliSense.

No file or test entry point is named. Start by locating the model-handling code that calls Type.GetProperty(), then determine how an IModel interface supporting int or Guid identifiers would fit; done means model processing can use the interface and provides the requested IntelliSense improvement.

Written by the indexing model from the issue text.