C#: XML string to XmlDocument

I have wrote some utility methods for creating XmlDocument from XML string.

    public static class XMLUtils
    {
        // xml string to XmlDocument
        public static XmlDocument ToXmlDocument(this string xml)
        {
            var doc = new XmlDocument();
            doc.LoadXml(xml);
            return doc;
        }

        // XmlReader to XmlDocument
        // XMLReader is useful for read xml data from url source
        public static XmlDocument ToXmlDocument(this XmlReader reader)
        {
            var doc = new XmlDocument();
            doc.Load(reader);
            return doc;
        }

        // path to xml file to XmlDocument
        public static XmlDocument ReadFromPath( string path)
        {
            return ToXmlDocument(File.ReadAllText(path));
        }

    }