Orchard CMS 中的 Work<> 类有什么用？

简单明了，它的用例是什么Orchard.Environment.Work<>类定义于Orchard\Environment\WorkContextModule.cs?

它可以在几个地方找到，例如

private readonly Work<IContainerService> _containerService;

public Shapes(Work<IContainerService> containerService) {
  _containerService = containerService;
...

是否是为了延迟解决IContainerService?

The Work类用于延迟加载依赖注入。实例化类时不会解决依赖关系，而是仅在调用类时解决依赖关系Value财产：

private readonly IMyService _myService;
private readonly IMyOtherService _myOtherService;
public MyClass(Work<IMyService> myService, IMyOtherService myOtherService) {
    // Just assign the Work class to the backing property
    // The dependency won't be resolved until '_myService.Value' is called
    _myService = myService;
    // The IMyOtherService is resolved and assigned to the _myOtherService property
    _myOtherService = myOtherService;
}

现在只有当_myService.Value被调用时，IMyService 由依赖解析器解析，这为您提供了延迟加载依赖注入的工作。