WorkflowApplication generate unhandle exception in ASP.NET
<p>am using simple persistence workflow application in ASP.NET when i try start workflow using 
WorkflowApplication invoker the .NET framework generate unhandled exception.</p>

<p>the exception is:</p>

<pre><code>Type 'VacationRequestWorkflow.VacationRequestModel' in Assembly 'VacationRequestWorkflow, Version=1.0.0.0, Culture=neutral, PublicKeyToken=84fad1a74027a4c8' is not marked as serializable.
</code></pre>

<p>i used</p>

<pre><code>ActivityXamlServices.Load(
                ActivityXamlServices.CreateReader(
                    new XamlXmlReader("*XAML path*",
                        new XamlXmlReaderSettings { LocalAssembly = Assembly.GetExecutingAssembly() })));
</code></pre>

<p>to resolve this issue but didn't work.</p>

<p>please advice.</p>
