[FromBody] Web parameter Api Asp.net arrives null if Text / xml is

hello I have the following problem with my web api I have an object

    public class Message
{
    public string Id { get; set; }
    public List<Resource> Contained { get; set; }
    public DateTimeOffset? Timestamp { get; set; }
    public Coding Event { get; set; }
    public MessageHeader.ResponseComponent Response { get; set; }
    public MessageHeader.MessageSourceComponent Source { get; set; }
    public List<MessageHeader.MessageDestinationComponent> Destination { get; set; }
}

which I receive by POST as follows

[Route("Update_Mensajestask/")]
    [HttpPost]
    public async Task<IHttpActionResult> Update_MensajestaskAsync( [FromBody]Message mensaje )
    {
        BusinessResult<int> bResult = null;
        try
        {
            _objNegocio = new Mensaje();
            bResult = await _objNegocio.UPDATE_MensajeRespuesta(mensaje).ConfigureAwait(false);
            if ( bResult.ResultType == ResultType.Failure )
            {
                return Ok(bResult.Message);

            }
            else
                return Ok(bResult.Result);
        }
        catch ( Exception )
        {

            throw;
        }

    }

but when I use the swagger service using parameter content type: application / xml or parameter content type: Text / xml the value of the object always arrives null, but if I use json, he recognizes me the object.

If someone can help me thank you in advance.