为什么COM对象不使用IDisposable？ [英] Why don't COM object use IDisposable?

问题描述

为什么COM对象在其CLR可调用包装器中不使用IDisposable？

Why don't COM object use IDisposable in their CLR Callable Wrappers?

推荐答案

大概是这样的 IDisposable 实现将调用 Marshal.ReleaseComObject 。

Presumably such an IDisposable implementation would call Marshal.ReleaseComObject.

在某些情况下，调用Marshal.ReleaseComObject是一个好主意，例如使Office应用程序在从.NET客户端自动化后退出。。

There are cases where calling Marshal.ReleaseComObject is a good idea, for example to get an Office application to quit after automation from a .NET client.

但是，正如 Marshal.ReleaseComObject 的文档所述，一般情况下不应使用它-可能根本不使用它。 -proc COM对象。 这是一篇博客文章，其中包含一些更详细的信息。

But as the documentation for Marshal.ReleaseComObject states, it should not be used in the general case - and probably not at all for in-proc COM objects. Here's a blog post with some more detailed info.

因此，鼓励人们通过从 IDisposable

Hence it would not have been a good idea to encourage people to use it by calling it from an IDisposable implementation in the RCW.

但是，有趣的是Silverlight 4 AutomationFactory.CreateObject 方法 返回的动态对象是 IDisposable 。测试似乎表明实际上确实发布了COM参考，尽管文档有点稀疏。

However, what's interesting is that the Silverlight 4 AutomationFactory.CreateObject method does return a dynamic object that is IDisposable. And tests seem to show that this does in fact release the COM reference, though documentation is a bit sparse.

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