Andrus,

>I'm trying to understand object persistence in MM.
>
>How to add and retrieve objects to/from memory cache ?
>
>Where to find sample about using mmPersistenceManager to cache business
>objects in memory ?
>
>I haven't found any implementation of mmPersitenceBase abstract class.
>Where to find its implementation ?

The persistence classes you're looking at are no longer in use in MM .NET (in fact, they are excluded in the next version). We will be using .NET Entity Framework's persistence manager in the future.

You can currently use the GetEntity() and SaveEntity() methods to retrieve and persist entities.

Best Regards,