using (var writer = XmlWriter.Create(Console.Out))
{
writer.WriteStartElement("Node");
writer.WriteAttributeString("a", "<b>");
}
Output <Node a="<b>" />
Firstly you should parse the string. Since this is not valid xml, you can't use an xml parser. You can try HtmlAgilityPack. Then you can write the values with xml writer.
string s = "<Node a="<b>">";
var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(s);
var node = doc.DocumentNode.FirstChild;
var attr = node.Attributes[0];
using (var writer = XmlWriter.Create(Console.Out))
{
writer.WriteStartElement(node.Name);
writer.WriteAttributeString(attr.Name, attr.Value);
}
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