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    <p>I strongly suspect that the data starts with a <a href="http://en.wikipedia.org/wiki/Byte_order_mark" rel="nofollow">byte order mark</a>, which can't be represented in ASCII.</p> <p>It's not clear why you're doing what you're doing in the first place, particularly around the <code>MemoryStream</code>. Why are you creating a UTF-8 encoded byte array, then decoding that to a string (and we don't know what <code>UTF8ByteArrayToString</code> does), then converting it <em>back</em> to a byte array? Why not just write the byte array straight to the client to start with? If you need the data as a string, I'd use a subclass of <code>StringWriter</code> which advertises that it uses UTF-8 as the encoding. If you <em>don't</em> need it as a string, just stick to the byte array.</p> <p>Note that even aside from this first character, the fact that you've got an XML document encoded in UTF-8 means there may well be other non-ASCII characters in the string. Why are you using ASCII at all here?</p> <p>EDIT: Just to be clear, you're fundamentally applying a lossy transformation, <em>and</em> doing it needlessly. Even if you want a local copy of the data, you should have something like this:</p> <pre><code>// Removed bad try/catch block - don't just catch Exception, and don't // just swallow exceptions MemoryStream memoryStream = new MemoryStream(); XmlSerializer xs = new XmlSerializer(typeof(WorkItem)); XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8); xs.Serialize(xmlTextWriter, p); // Removed pointless conversion to/from string // Removed pointless BinaryWriter (just use the stream) // An alternative would be memoryStream.WriteTo(clientStream); byte[] data = memoryStream.ToArray(); clientStream.Write(data, 0, data.Length); Console.WriteLine(" send.." + data); // Removed Close calls - you should use "using" statements to dispose of // streams automatically. </code></pre>
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    1. POwhy is ASCII.GetBytes returning wrong bytes
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    1. POwhy is ASCII.GetBytes returning wrong bytes
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    1. COI want to send the class to a java client. Thats why i first convert the class to XML and then to bytes.
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    2. CO@Erik: But you're converting it *directly* to bytes, in a `MemoryStream`. Why are you then converting it to a string and then *back* to bytes, using the wrong encoding? Why are you even using a `MemoryStream` instead of creating the `XmlTextWriter` straight from `clientStream`?
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    3. COreally :) that was not right of cource
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