blocks|key|1297276|text|不，流通常引用某种类型的本地资源(套接字、文件句柄等)，因此它们不能被克隆或序列化。此外，许多流是只向前的，不支持查找，因此您甚至可能无法从流中重新读取。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1297277|但是，从可读流中可以做的是将其复制到一个可以作为字节数组移动的MemoryStream中。|1297278|请参阅下面的帖子，获取演示如何执行此操作的代码片段：How+do+I+copy+the+contents+of+one+stream+to+another?|offset|length|1297279|public+static+void+CopyStream(Stream+input,+Stream+output)
{
++++byte[]+buffer+=+new+byte[32768];
++++while+(true)
++++{
++++++++int+read+=+input.Read+(buffer,+0,+buffer.Length);
++++++++if+(read+<=+0)
++++++++++++return;
++++++++output.Write+(buffer,+0,+read);
++++}
}|code-block|syntax|javascript|1297280|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/230128/best-way-to-copy-between-two-stream-instances-c^0|0|0|Q|1G|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@$F|X|G|Y|1|Z]]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

No, streams usually refer to local resources of some kind (a socket, a file handle, etc) and so they can't be cloned or serialized. Furthermore many streams are forward-only and do not support seeking so you might not even be able to re-read from a stream.

What you can do from a readable stream though is copy it into a MemoryStream which can be moved around as a byte array.

See the following post for a code snippet showing how to do this:
<a href="https://stackoverflow.com/questions/230128/best-way-to-copy-between-two-stream-instances-c">How do I copy the contents of one stream to another?</a>

<pre><code>public static void CopyStream(Stream input, Stream output)
{
 byte[] buffer = new byte[32768];
 while (true)
 {
 int read = input.Read (buffer, 0, buffer.Length);
 if (read &lt;= 0)
 return;
 output.Write (buffer, 0, read);
 }
}
</code></pre>

blocks|key|1297346|text|不，你不能克隆一个泛型流。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1297347|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

No, you can't clone a generic stream.

blocks|key|1297429|text|不是的。在Stream类上，通常不支持克隆操作。要做到这一点，它必须包含Stream类的所有可能实现。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1297430|对于像FileStream这样的项目，这可能是可行的，但考虑一下这对NetworkStream意味着什么。克隆通常具有创建完全独立的对象的概念，这些对象在创建时是相同的。这在像TCP连接这样的项目上通常是不可行的，这些项目通常在某种程度上被包装在NetworkStream中。|1297431|entityMap^0|5|6|10|6|0|3|A|Y|D|3F|D|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|I|$]]

No. Cloning is not a generally supported operation on the <code>Stream</code> class. To be so it would have to encompass all possible implementations of the <code>Stream</code> class. 

This may be doable for items like a <code>FileStream</code> but consider what this would mean for say a <code>NetworkStream</code>. Cloning generally has the concept of creating completely separate objects which are identical at the point of creation. This is not generally doable on items like TCP connections which are typically wrapped in a <code>NetworkStream</code> at some level.

blocks|key|1297473|text|不确定您是要在流被消费之前还是之后克隆它。如果您需要将流复制到其他目的，这可能会有一些帮助。我需要访问一个封闭流的内容，这允许我将原始流内容复制到另一个流。Accessing+a+closed+stream。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1297474|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/12487846/3841460^0|26|P|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Not sure if you want to clone the stream before or after it has been consumed. This might be of some help if you need to duplicate the stream for other purposes. I needed to access the contents of a closed stream and this allowed me to copy the original stream contents to another stream.
<a href="https://stackoverflow.com/a/12487846/3841460">Accessing a closed stream</a>.

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