在ASP.NET MVC中的回发之间保留复杂数据

I'm developing an ASP.NET MVC 2 application that connects to some services to do data retrieval and update. The services require that I provide the original entity along with the updated entity when updating data. This is so it can do change tracking and optimistic concurrency. The services cannot be changed.I'm developing an ASP.NET MVC 2 application tha