ASP.NET MVC: dealing with Version field

I have a versioned model:

public class VersionedModel
{
    public Binary Version { get; set; }
}

Rendered using

<%= Html.Hidden("Version") %>

it gives:

<input id="Version" name="Version" type="hidden" value="&quot;AQID&quot;" />

that looks a bit strange. Any way, when the form submitted, the Version field is always null.

public ActionResult VersionedUpdate(VersionedModel data)
{ 
    ...
}

How can I pass Version over the wire?

EDIT:

A naive solution is:

public ActionResult VersionedUpdate(VersionedModel data)
{ 
    data.Version = GetBinaryValue("Version");
}

private Binary GetBinaryValue(string name)
{
    return new Binary(Convert.FromBase64String(this.Request[name].Replace("\"", "")));
}

Solution

This post http://forums.asp.net/p/1401113/3032737.aspx#3032737 suggests to use LinqBinaryModelBinder from http://aspnet.codeplex.com/SourceControl/changeset/view/21528#338524.

Once registered

protected void Application_Start()
{
    ModelBinders.Binders.Add(typeof(Binary), new LinqBinaryModelBinder());
}

the binder will automatically deserialize Version field

public ActionResult VersionedUpdate(VersionedModel data) 
{ ... }

rendered this way:

<%= Html.Hidden("Version") %>