What would cause this custom XML ModelBinder to not deserialize my XML POST?

Question

The Model

public class SimpleUser
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string UserNam         


        

Answer 1

What am I missing here?

You are missing to reset the stream before consuming it:

var inputStream = controllerContext.HttpContext.Request.InputStream;
inputStream.Position = 0;
return serializer.Deserialize(inputStream);

or use an XmlReader:

using (var inputStream = controllerContext.HttpContext.Request.InputStream)
using (var reader = XmlReader.Create(inputStream))
{
    return serializer.Deserialize(reader);
}