using System;

using System.Xml.Serialization;

using System.Xml;

using System.IO;

​

public enum TipoDoAmbiente

{

​

    [XmlEnumAttribute("1")]

    Item1,

​

    [XmlEnumAttribute("2")]

    Item2,

}

​

public class TesteClasse 

{

    public TipoDoAmbiente TipoDoAmbiente { get; set; }

}

public class Program

{

    public static void Main()

    {

        var xml = "<?xml version=\"1.0\" encoding=\"utf-16\"?><TesteClasse xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><TipoDoAmbiente>2</TipoDoAmbiente></TesteClasse>";

        var xmlSerializer = new XmlSerializer(typeof(TesteClasse));

        TesteClasse testeClasse = (TesteClasse)xmlSerializer.Deserialize(XmlReader.Create(new StringReader(xml)));

        Console.WriteLine(testeClasse.TipoDoAmbiente);

    }

}