using System;

using System.Xml;                   

public class Program

{

    public static void Main()

    {

        var MihaString = "<MeuXML Info01=\"teste 0121245\" Info02=\"2020-01-14\" Info03=\"2019-12-30\"/>";

        XmlDocument xmlDocument = new XmlDocument();

        xmlDocument.LoadXml(MihaString);

​

        XmlDocument xmlResult = new XmlDocument();

​

        var root = xmlResult.CreateElement("MeuXMLPai");

        var items = xmlResult.CreateElement("MeuXML");

​

        foreach(XmlAttribute xmlAttribute in xmlDocument.DocumentElement.Attributes)

        {

            var item = xmlResult.CreateElement(xmlAttribute.Name);

            item.InnerText = xmlAttribute.Value;

            items.AppendChild(item);

        }

        root.AppendChild(items);

        xmlResult.AppendChild(root);

        Console.WriteLine(xmlResult.OuterXml);

    }

}