gistfile1.cs

public static IEnumerable<object> GetAllInstances(this IContainer container, IEnumerable<Type> types)
{
    return container.Model.AllInstances.
        Join(types, x => x.PluginType, y => y, (x, y) => x).
        Select(x => x.ConcreteType).
        Distinct().
        Select(container.GetInstance);
}