public List <T> listar <T>(Uri uriBase)
{
var httpWebRequest = (HttpWebRequest)WebRequest.Create(
new Uri(uriBase, "xml"));
httpWebRequest.ContentType = "application/xml";
httpWebRequest.Method = "GET";
string resposta = Requisicao.realizarSemConteudo(httpWebRequest);
XmlSerializer serializador = new XmlSerializer(typeof(List <T>), new XmlRootAttribute("list"));
StringReader leitorString = new StringReader(resposta);
XmlTextReader leitorXml = new XmlTextReader(leitorString);
return(serializador.Deserialize(leitorXml) as List <T>);
}