Is there a standard literal constant that I can use instead of "utf-8" in C# (.Net 3.5)?

Question

Hi,

I would like to find a better way to do this:

XmlNode nodeXML = xmlDoc.AppendChild( xmlDoc.CreateXmlDeclaration( "1.0", "utf-8", String.Empty) );

I do not want to think about "utf-8" vs "UTF-8" vs "UTF8" vs "utf8" as I type code. I would like to make my code less prone to typos. I am sure that some standard library has declatred "utf-8" as a const / readonly string. How can I find it? Also, what about "1.0"? I am assuming that major XML versions have been enumerated somewhere as well.

Thanks!

Answer 1

You can use Encoding.UTF8 from System.Text.

Answer 2

Try Encoding.UTF8.WebName.

Answer 3

It is easy to avoid by using an XmlWriter to write the document. The default writer automatically encodes in utf8 and generates the processing instruction:

        var doc = new XmlDocument();
        doc.InnerXml = "<root></root>";
        using (var wrt = XmlWriter.Create(@"c:\temp\test.xml")) {
            doc.WriteTo(wrt);
        }

Output:

        <?xml version="1.0" encoding="utf-8"?><root></root>