internal abstract class ViewModel : IViewModel
{
    private readonly AutoResetEvent autoResetEvent = new AutoResetEvent(true);

    protected Task SynchronousTask(IList<Action> actions)
    {
        var initialTask = new Task(() => this.autoResetEvent.WaitOne());

        for (var i = 0; i < actions.Count; i++)
        {
            var i1 = i;
            initialTask.ContinueWith(task => actions[i1]());
        }

        initialTask.ContinueWith(task => this.autoResetEvent.Set());

        initialTask.Start();
        return initialTask;
    }
}