c# - 如果我在使用语句结束之前调用 Dispose() 会发生什么？

Question

我有这段代码，我担心它“不安全”我在 using 语句结束之前使用了 Dispose() ，对我来说这有点不合逻辑，但它工作得很好。那么，它安全吗？

using (FileStream stream = new FileStream(SfilePath, FileMode.Open))
{
    try
    {
        XmlSerializer deserializer = new XmlSerializer(typeof(HighscoresViewModel));
        HVM = deserializer.Deserialize(stream) as HighscoresViewModel;
    }
    catch (InvalidOperationException) 
    {
        stream.Dispose();
        (new FileInfo(SfilePath)).Delete();
        HVM = new HighscoresViewModel();
    }
}

Answer 1

IDisposable.Dispose 的文档状态:

If an object's Dispose method is called more than once, the object must ignore all calls after the first one. The object must not throw an exception if its Dispose method is called multiple times. Instance methods other than Dispose can throw an ObjectDisposedException when resources are already disposed.

假设 IDisposable 被正确实现，这种使用是安全的。 Dispose 将被第二次调用，第二次什么都不做。