Backbone.rsync.js usage. Request for comments.

QuestionHub.cs

public class QuestionHub : BackboneModelHub<Question>
{
    private static readonly List<Question> questions = new List<Question>();

    protected override Question CreateModel(Question question)
    {
        question.Id = Guid.NewGuid();
        questions.Add(question);
        return question;
    }

    protected override Question UpdateModel(Question model)
    {
        var location = questions.FindIndex(q => q.Id == model.Id);
        if (location < 0) return model;

        questions[location] = model;
        return model;
    }

    protected override Question FindModel(Question model)
    {
        return questions.Find(q => q.Id == model.Id);
    }

    protected override IEnumerable<Question> FindModels()
    {
        return questions;
    }

    protected override Question DeleteModel(Question model)
    {
        var existing = questions.Find(q => q.Id == model.Id);

        if (existing == null) return null;

        questions.Remove(existing);
        return existing;

    }
}

questions.js

App.Collections.Questions = Backbone.Collection.extend({
    model: App.Models.Question,
    signalRHub: new Backbone.SignalR("questionHub"),
    
    initialize: function() {
        this.signalRHub.syncUpdates(this);
    }
});