c# - Stream.Dispose 是否总是调用 Stream.Close(和 Stream.Flush)

Question

如果我有以下情况:

StreamWriter MySW = null;
try
{
   Stream MyStream = new FileStream("asdf.txt");
   MySW = new StreamWriter(MyStream);
   MySW.Write("blah");
}
finally
{
   if (MySW != null)
   {
      MySW.Flush();
      MySW.Close();
      MySW.Dispose();
   }
}

我是否可以只调用 MySW.Dispose() 并跳过关闭，即使它已提供？是否有任何 Stream implimentations 无法按预期工作(如 CryptoStream)？

如果不是，那么下面就是错误的代码:

using (StreamWriter MySW = new StreamWriter(MyStream))
{
   MySW.Write("Blah");
}

Answer 1

Can I just call MySW.Dispose() and skip the Close even though it is provided?

是的，这就是它的用途。

Are there any Stream implementations that don't work as expected (Like CryptoStream)?

可以安全地假设，如果一个对象实现了 IDisposable，它将正确地处理自己。

如果没有，那就是一个错误。

If not, then is the following just bad code:

不，该代码是处理实现 IDisposable 对象的推荐方式。

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