title: how to set serializable attribute on my entities?
body: <p>my site is on a web farm for this i used my session in mode="StateServer" in this mode objects must have serialize able attribute ,
  i used ado.net entity data model it works fine and i have no problems with these.</p>
  
  <p>i update my project to vs 2012 but my ef stay on 4.1 because my host don not support  upper version of  ef, when i deleted my entity and create it again it's structure changed you can look at this <a href="https://stackoverflow.com/questions/13029667/why-ado-net-entity-data-model-changed-in-vs-2012">my post</a> but in new model the serialize able attribute is unavailable and do not created automatically by ef i look at codes and add it by myself but if i recreate my model all of them will be delete how can i handle this problem?</p>
  
  <p>thanks guys</p>