MVC + Forms: error message

I am getting the following error when I try to do a simple form post on my MVC website.

Accessing a BinaryRead, Form, Files, or InputStream before internal memory was full of the caller's HttpRequest.GetBufferedInputStream.

Description: An unhandled exception was thrown during the execution of the current web request. Review the stack trace for more information about the error and how it occurs in your code.

Exception Details: System.InvalidOperationException: A BinaryRead, Form, Files, or InputStream was accessed before internal memory was full of the caller HttpRequest.GetBufferedInputStream.

My sample form and actions are pretty simple ...

@using (Html.BeginForm("Create", "Form"))
{
    <div class="row action">
        <div class="row">
            First name: <input type="text" name="fname"><br>
            Last name: <input type="text" name="lname"><br>
        </div>
        <input type="submit" id="save" class="btn" value="Save"/>
        <input type="button" id="cancel" class="btn" value="Cancel"/>
     </div>
}

      

        
        
        
      

    

And my controller action is even more basic ...

[HttpPost]
    public ActionResult Create(FormCollection collection)
    {
        try
        {
            // TODO: Add insert logic here

            return RedirectToAction("Index");
        }
        catch
        {
            return View();
        }
    }