Bug 4850 - XDocument.WriteTo() does not write <?xml?> preamble/header (.NET does)
Summary: XDocument.WriteTo() does not write <?xml?> preamble/header (.NET does)
Status: RESOLVED FIXED
Alias: None
Product: Class Libraries
Classification: Mono
Component: System.XML ()
Version: 2.10.x
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2012-05-02 19:26 UTC by Aaron Bockover
Modified: 2012-05-14 04:29 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:


Attachments
Test Case (560 bytes, application/octet-stream)
2012-05-02 19:26 UTC, Aaron Bockover
Details


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Status:
RESOLVED FIXED

Description Aaron Bockover 2012-05-02 19:26:27 UTC
Created attachment 1797 [details]
Test Case

The following test produces different documents on Mono vs .NET:


using System;
using System.Text;
using System.Xml;
using System.Xml.Linq;

public static class Entry
{
    public static void Main (string [] args)
    {
        var doc = new XDocument (
            new XElement("resources",
                new XElement("string",
                    new XAttribute("name", "whatever"),
                    "This is sparta")
            )
        );

        using (var writer = new XmlTextWriter (args[0], Encoding.UTF8) {
            Formatting = Formatting.Indented }) {
            doc.WriteTo (writer);
        }
    }
}

Mono produces:

<resources>
  <string name="whatever">This is sparta</string>
</resources>

While .NET produces:

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string name="whatever">This is sparta</string>
</resources>

The only difference being the addition of the <?xml version="1.0" encoding="utf-8"?>

Note that if the encoding argument to the XmlTextWriter constructor is specified as null then no encoding attribute is written to the header.

Mono should match .NET.
Comment 1 Atsushi Eno 2012-05-14 04:19:32 UTC
It's not about XmlTextWriter but rather about XDocument.WriteTo().

I'm fixing the issue.
Comment 2 Atsushi Eno 2012-05-14 04:29:40 UTC
Fixed in git master and 2-10. Thanks.