问题
Is it safe to use the same Encoding object from different threads?
By "using" I mean, calling Encoding.GetString(), Encoding.GetBytes() and write some XML with an XmlWriter (created by something like XmlWriter.Create(myStream, new XmlWriterSettings() { Encoding = myEncoding }).
The msdn site states that "Any instance members are not guaranteed to be thread safe".
So, how can I safely write two XML documents concurrently? (thank you!!)
回答1:
Yes, it should be safe to use the same Encoding object, as it's designed to be stateless - whereas Encoder and Decoder are stateful, maintaining incomplete characters etc if necessary. I suppose you could write a stateful Encoding class, but it would be a really bad idea. As far as I'm aware, all of the built-in encoding implementations are stateless and thread-safe.
For example, the Encoding.UTF8, Encoding.ASCII etc properties are singletons.
来源：https://stackoverflow.com/questions/3024384/thread-safety-and-system-text-encoding-in-c-sharp