Rhino Commons - With

The With.* set of classes has a single thing in common, they take a delegate and add functionality but handling pre/post and exceptional behavior.

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With.Transaction

Will use the UnitOfWork to start a transaction, and automatically commit it if it was successful, or rollback if it failed. The usage is simply:

With.Transaction(delegate{
  Repository.Save(new Post("abc","foo"));
});

The main advantage here is, of course, the automatic rollback/commit.

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With.Caching

This offers several methods that integrate into NHibernate query caching capabilities, and allow to cache all queries that are run until it is disposed delegate:

using(With.QueryCache())
{
  return Repository.FindAll(Where.Customer.Important == true);
}

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With.PerformanceCounter

Allows you to very accurately time the length of time an operation took:

double duration = With.PerformanceCounter(delegate{
  DoSomething();
});

And now you can use the duration to do whatever you want, it is using the Windows performance counters, so it is very accurate.