lazy load 4

gistfile1.txt

[Serializable]
public sealed class LazyLoadAttribute : LocationInterceptionAspect
{
    private Type _type;

    public override bool CompileTimeValidate(PostSharp.Reflection.LocationInfo locationInfo)
    {
        _type = DependencyMap.GetConcreteType(locationInfo.LocationType);
        if(_type == null)
        {
            Message.Write(SeverityType.Error, "002", "A concrete type was not found");
            return false;
        }
        return true;
    }

    public override void OnGetValue(LocationInterceptionArgs args)
    {
        args.ProceedGetValue();
        if (args.Value == null)
        {
            form.LogLogLogListBox.Items.Add("Instantiating UserService");
            args.SetNewValue(Activator.CreateInstance(_type));
        }
        else
        {
            form.LogLogLogListBox.Items.Add("Using a UserService that has already been created");
        }
        args.ProceedGetValue();
    }
}