How convert xml string UTF8 to UTF16?

Question

I have a string of XML(utf-8).I need to store the string in the database(MS SQL). Encoding a string must be UTF-16.

This code does not work, utf16Xml is empty

XDocument xDoc = XDocument.Parse(utf8Xml);
xDoc.Declaration.Encoding = "utf-16";
StringWriter writer = new StringWriter();
XmlWriter xml = XmlWriter.Create(writer, new XmlWriterSettings() 
            { Encoding = writer.Encoding, Indent = true });

xDoc.WriteTo(xml);

string utf16Xml = writer.ToString();

utf8Xml - string contains a serialize object(encoding UTF8).

How convert xml string UTF8 to UTF16?

Answer 1

This might help you

MemoryStream ms = new MemoryStream();
        XmlWriterSettings xws = new XmlWriterSettings();
        xws.OmitXmlDeclaration = true;
        xws.Indent = true;
        XDocument xDoc = XDocument.Parse(utf8Xml);
        xDoc.Declaration.Encoding = "utf-16";
        using (XmlWriter xw = XmlWriter.Create(ms, xws))
        {

            xDoc.WriteTo(xw);
        }
        Encoding ut8 = Encoding.UTF8;
        Encoding ut116 = Encoding.Unicode;
        byte[] utf16XmlArray = Encoding.Convert(ut8, ut116, ms.ToArray());
        var utf16Xml = Encoding.Unicode.GetString(utf16XmlArray);